Purpur/patches/server/0002-Airplane-Server-Changes.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Paul Sauve <paul@technove.co>
Date: Sat, 31 Oct 2020 19:21:42 -0500
Subject: [PATCH] Airplane Server Changes

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diff --git a/pom.xml b/pom.xml
index de7da911833569c97b7f800a43ee7354d19677e2..c917f825378dd16a329105b4e7fcc8882755bc5a 100644
--- a/pom.xml
+++ b/pom.xml
@@ -39,8 +39,8 @@
 
     <dependencies>
         <dependency>
-            <groupId>com.tuinity</groupId>
-            <artifactId>tuinity-api</artifactId>
+            <groupId>gg.airplane</groupId>
+            <artifactId>airplane-api</artifactId>
             <version>${project.version}</version>
             <scope>compile</scope>
         </dependency>
@@ -166,6 +166,20 @@
             <version>1.1.0-SNAPSHOT</version>
             <scope>compile</scope>
         </dependency>
+        <!-- Airplane Config -->
+        <dependency>
+            <groupId>com.github.technove</groupId>
+            <artifactId>AIR</artifactId>
+            <version>fe3dbb4420</version>
+            <scope>compile</scope>
+        </dependency>
+        <!-- Airplane - Flare -->
+        <dependency>
+            <groupId>com.github.technove</groupId>
+            <artifactId>Flare</artifactId>
+            <version>master-SNAPSHOT</version>
+            <scope>compile</scope>
+        </dependency>
     </dependencies>
 
     <!-- This builds a completely 'ready to start' jar with all dependencies inside -->
diff --git a/src/main/java/com/destroystokyo/paper/Metrics.java b/src/main/java/com/destroystokyo/paper/Metrics.java
index 52c0ab1ce46e1f3233ef746d9bc699356fa9fae4..b480bd3044370b8eb733166f0c4b737344475993 100644
--- a/src/main/java/com/destroystokyo/paper/Metrics.java
+++ b/src/main/java/com/destroystokyo/paper/Metrics.java
@@ -593,7 +593,7 @@ public class Metrics {
             boolean logFailedRequests = config.getBoolean("logFailedRequests", false);
             // Only start Metrics, if it's enabled in the config
             if (config.getBoolean("enabled", true)) {
-                Metrics metrics = new Metrics("Tuinity", serverUUID, logFailedRequests, Bukkit.getLogger()); // Tuinity - we have our own bstats page
+                Metrics metrics = new Metrics("Airplane", serverUUID, logFailedRequests, Bukkit.getLogger()); // Tuinity - we have our own bstats page // Airplane
 
                 metrics.addCustomChart(new Metrics.SimplePie("minecraft_version", () -> {
                     String minecraftVersion = Bukkit.getVersion();
@@ -603,7 +603,7 @@ public class Metrics {
 
                 metrics.addCustomChart(new Metrics.SingleLineChart("players", () -> Bukkit.getOnlinePlayers().size()));
                 metrics.addCustomChart(new Metrics.SimplePie("online_mode", () -> Bukkit.getOnlineMode() || PaperConfig.isProxyOnlineMode() ? "online" : "offline"));
-                metrics.addCustomChart(new Metrics.SimplePie("tuinity_version", () -> (Metrics.class.getPackage().getImplementationVersion() != null) ? Metrics.class.getPackage().getImplementationVersion() : "unknown")); // Tuinity - we have our own bstats page
+                metrics.addCustomChart(new Metrics.SimplePie("airplane_version", () -> (Metrics.class.getPackage().getImplementationVersion() != null) ? Metrics.class.getPackage().getImplementationVersion() : "unknown")); // Tuinity - we have our own bstats page // Airplane
 
                 metrics.addCustomChart(new Metrics.DrilldownPie("java_version", () -> {
                     Map<String, Map<String, Integer>> map = new HashMap<>();
diff --git a/src/main/java/com/destroystokyo/paper/PaperConfig.java b/src/main/java/com/destroystokyo/paper/PaperConfig.java
index efc1e42d606e1c9feb1a4871c0714933ae92a1b2..14ac28d4d6b1ab0f0a70dfefc589f7723a1d2e1a 100644
--- a/src/main/java/com/destroystokyo/paper/PaperConfig.java
+++ b/src/main/java/com/destroystokyo/paper/PaperConfig.java
@@ -202,6 +202,15 @@ public class PaperConfig {
     public static String timingsServerName;
     private static void timings() {
         boolean timings = getBoolean("timings.enabled", true);
+        // Airplane start
+        boolean reallyEnableTimings = getBoolean("timings.really-enabled", false);
+        if (timings && !reallyEnableTimings) {
+            Bukkit.getLogger().log(Level.WARNING, "[Airplane] To improve performance, timings have been disabled by default");
+            Bukkit.getLogger().log(Level.WARNING, "[Airplane] You can still use timings by using /timings on, but they will not start on server startup unless you set timings.really-enabled to true in paper.yml");
+            Bukkit.getLogger().log(Level.WARNING, "[Airplane] If you would like to disable this message, either set timings.really-enabled to true or timings.enabled to false.");
+        }
+        timings = reallyEnableTimings;
+        // Airplane end
         boolean verboseTimings = getBoolean("timings.verbose", true);
         TimingsManager.privacy = getBoolean("timings.server-name-privacy", false);
         TimingsManager.hiddenConfigs = getList("timings.hidden-config-entries", Lists.newArrayList("database", "settings.bungeecord-addresses", "settings.velocity-support.secret"));
diff --git a/src/main/java/com/destroystokyo/paper/PaperVersionFetcher.java b/src/main/java/com/destroystokyo/paper/PaperVersionFetcher.java
index 7063f1da3654b382e26b0093ad5d0ff04a2b38c2..b9c5479e5561f8fe68ea8f94fbf4e64de8a53bf9 100644
--- a/src/main/java/com/destroystokyo/paper/PaperVersionFetcher.java
+++ b/src/main/java/com/destroystokyo/paper/PaperVersionFetcher.java
@@ -28,8 +28,8 @@ public class PaperVersionFetcher implements VersionFetcher {
     @Nonnull
     @Override
     public Component getVersionMessage(@Nonnull String serverVersion) {
-        String[] parts = serverVersion.substring("git-Tuinity-".length()).split("[-\\s]"); // Tuinity
-        final Component updateMessage = getUpdateStatusMessage("Spottedleaf/Tuinity", GITHUB_BRANCH_NAME, parts[0]); // Tuinity
+        String[] parts = serverVersion.substring("git-Airplane-".length()).split("[-\\s]"); // Tuinity
+        final Component updateMessage = getUpdateStatusMessage("TECHNOVE/Airplane", GITHUB_BRANCH_NAME, parts[0]); // Tuinity
         final Component history = getHistory();
 
         return history != null ? TextComponent.ofChildren(updateMessage, Component.newline(), history) : updateMessage;
diff --git a/src/main/java/gg/airplane/AirplaneCommand.java b/src/main/java/gg/airplane/AirplaneCommand.java
new file mode 100644
index 0000000000000000000000000000000000000000..89c89e633f14b5820147e734b1b7ad8cadfdce80
--- /dev/null
+++ b/src/main/java/gg/airplane/AirplaneCommand.java
@@ -0,0 +1,65 @@
+package gg.airplane;
+
+import net.kyori.adventure.text.Component;
+import net.kyori.adventure.text.format.NamedTextColor;
+import net.md_5.bungee.api.ChatColor;
+import net.minecraft.server.MinecraftServer;
+import org.bukkit.Bukkit;
+import org.bukkit.Location;
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandSender;
+
+import java.io.IOException;
+import java.util.Collections;
+import java.util.List;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
+public class AirplaneCommand extends Command {
+
+    public AirplaneCommand() {
+        super("airplane");
+        this.description = "Airplane related commands";
+        this.usageMessage = "/airplane [reload | version]";
+        this.setPermission("bukkit.command.airplane");
+    }
+
+    @Override
+    public List<String> tabComplete(CommandSender sender, String alias, String[] args, Location location) throws IllegalArgumentException {
+        if (args.length == 1) {
+            return Stream.of("reload", "version")
+              .filter(arg -> arg.startsWith(args[0].toLowerCase()))
+              .collect(Collectors.toList());
+        }
+        return Collections.emptyList();
+    }
+
+    @Override
+    public boolean execute(CommandSender sender, String commandLabel, String[] args) {
+        if (!testPermission(sender)) return true;
+        String prefix = ChatColor.of("#6a7eda") + "" + ChatColor.BOLD + "Airplane ✈ " + ChatColor.of("#e8ebf9");
+
+        if (args.length != 1) {
+            sender.sendMessage(prefix + "Usage: " + usageMessage);
+            args = new String[]{"version"};
+        }
+
+        if (args[0].equalsIgnoreCase("reload")) {
+            MinecraftServer console = MinecraftServer.getServer();
+            try {
+                AirplaneConfig.load();
+            } catch (IOException e) {
+                sender.sendMessage(Component.text("Failed to reload.", NamedTextColor.RED));
+                e.printStackTrace();
+                return true;
+            }
+            console.server.reloadCount++;
+
+            Command.broadcastCommandMessage(sender, prefix + "Airplane configuration has been reloaded.");
+        } else if (args[0].equalsIgnoreCase("version")) {
+            Command.broadcastCommandMessage(sender, prefix + "This server is running " + Bukkit.getName() + " version " + Bukkit.getVersion() + " (Implementing API version " + Bukkit.getBukkitVersion() + ")");
+        }
+
+        return true;
+    }
+}
diff --git a/src/main/java/gg/airplane/AirplaneConfig.java b/src/main/java/gg/airplane/AirplaneConfig.java
new file mode 100644
index 0000000000000000000000000000000000000000..65adf3ceda012c8cfdea675c40e2bb27d34ebac7
--- /dev/null
+++ b/src/main/java/gg/airplane/AirplaneConfig.java
@@ -0,0 +1,123 @@
+package gg.airplane;
+
+import co.technove.air.AIR;
+import net.minecraft.server.MinecraftServer;
+import org.apache.logging.log4j.Level;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.lang.reflect.Method;
+import java.lang.reflect.Modifier;
+
+public class AirplaneConfig {
+
+    private static AIR config;
+
+    public static void load() throws IOException {
+        File configFile = new File("airplane.air");
+        if (configFile.exists()) {
+            try (FileInputStream inputStream = new FileInputStream(configFile)) {
+                config = new AIR(inputStream);
+            }
+        } else {
+            config = new AIR();
+        }
+
+        config.setComment("info",
+          "Airplane Configuration",
+          "Read https://blog.airplane.gg/ to find out more about Airplane",
+          "Join our Discord to receive support & optimization help: https://discord.gg/3gtc45q");
+        config.getString("info.version", "1.0");
+
+        for (Method method : AirplaneConfig.class.getDeclaredMethods()) {
+            if (Modifier.isStatic(method.getModifiers()) && Modifier.isPrivate(method.getModifiers())) {
+                method.setAccessible(true);
+                try {
+                    method.invoke(null);
+                } catch (Throwable t) {
+                    MinecraftServer.LOGGER.log(Level.WARN, "Failed to load configuration option from " + method.getName(), t);
+                }
+            }
+        }
+
+        try (FileOutputStream outputStream = new FileOutputStream(configFile)) {
+            config.save(outputStream);
+        }
+    }
+
+
+    public static int startDistance;
+    public static int startDistanceSquared;
+    public static int maximumActivationPrio;
+    public static int activationDistanceMod;
+    public static boolean dynamicVillagerBehavior;
+    public static boolean dynamicPiglinBehavior;
+    public static boolean dynamicHoglinBehavior;
+
+    private static void dynamicActivationRange() {
+        config.setComment("activation-range", "Optimizes how entities act when", "they're far away from the player");
+
+        startDistance = config.getInt("activation-range.start-distance", 12,
+          "This value determines how far away an entity has to be",
+          "from the player to start being effected by DEAR.");
+        startDistanceSquared = startDistance * startDistance;
+        maximumActivationPrio = config.getInt("activation-range.max-tick-freq", 20,
+          "This value defines how often in ticks, the furthest entity",
+          "will get their pathfinders and behaviors ticked. 20 = 1s");
+        activationDistanceMod = config.getInt("activation-range.activation-dist-mod", 8,
+          "This value defines how much distance modifies an entity's",
+          "tick frequency. freq = (distanceToPlayer^2) / (2^value)",
+          "If you want further away entities to tick less often, use 7.",
+          "If you want further away entities to tick more often, try 9.");
+
+        config.setComment("behavior-activation", "A list of entities to use the dynamic activation range", "to modify how often their behaviors are ticked");
+
+        dynamicVillagerBehavior = config.getBoolean("behavior-activation.villager", true);
+        dynamicPiglinBehavior = config.getBoolean("behavior-activation.piglin", true);
+        dynamicHoglinBehavior = config.getBoolean("behavior-activation.hoglin", true);
+    }
+
+
+    public static String profileWebUrl;
+
+    private static void profilerOptions() {
+        config.setComment("flare", "Configures Flare, the built-in profiler");
+
+        profileWebUrl = config.getString("flare.url", "https://flare.airplane.gg", "Sets the server to use for profiles.");
+    }
+
+
+    public static String accessToken;
+
+    private static void airplaneWebServices() {
+        config.setComment("web-services", "Options for connecting to Airplane's online utilities");
+
+        accessToken = config.getString("web-services.token", "");
+        // todo lookup token (off-thread) and let users know if their token is valid
+        if (accessToken.length() > 0) {
+            gg.airplane.flare.FlareSetup.init(); // Airplane
+        }
+    }
+
+
+    public static byte entityDespawnCheckFrequency;
+
+    private static void entitySettings() {
+        config.setComment("entities", "Configures settings for generic entities");
+
+        entityDespawnCheckFrequency = (byte) Math.max(config.getInt("entities.despawn-check-freq", 8), Byte.MAX_VALUE);
+    }
+
+
+    public static boolean disableMethodProfiler;
+
+    private static void miscSettings() {
+        config.setComment("misc", "Settings for things that don't belong elsewhere");
+
+        disableMethodProfiler = config.getBoolean("misc.disable-method-profiler", true);
+    }
+
+
+}
diff --git a/src/main/java/gg/airplane/AirplaneLogger.java b/src/main/java/gg/airplane/AirplaneLogger.java
new file mode 100644
index 0000000000000000000000000000000000000000..1a9d71739019d12772bec6076b195552ff6299f9
--- /dev/null
+++ b/src/main/java/gg/airplane/AirplaneLogger.java
@@ -0,0 +1,17 @@
+package gg.airplane;
+
+import org.bukkit.Bukkit;
+
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+public class AirplaneLogger extends Logger {
+    public static final AirplaneLogger LOGGER = new AirplaneLogger();
+
+    private AirplaneLogger() {
+        super("Airplane", null);
+
+        setParent(Bukkit.getLogger());
+        setLevel(Level.ALL);
+    }
+}
diff --git a/src/main/java/gg/airplane/commands/AirplaneCommands.java b/src/main/java/gg/airplane/commands/AirplaneCommands.java
new file mode 100644
index 0000000000000000000000000000000000000000..66b20250a26d005427601b1cdee43bdd9eba70cc
--- /dev/null
+++ b/src/main/java/gg/airplane/commands/AirplaneCommands.java
@@ -0,0 +1,12 @@
+package gg.airplane.commands;
+
+import gg.airplane.AirplaneCommand;
+import gg.airplane.flare.FlareCommand;
+import net.minecraft.server.MinecraftServer;
+
+public class AirplaneCommands {
+    public static void init() {
+        MinecraftServer.getServer().server.getCommandMap().register("airplane", "Airplane", new AirplaneCommand());
+        MinecraftServer.getServer().server.getCommandMap().register("flare", "Airplane", new FlareCommand());
+    }
+}
diff --git a/src/main/java/gg/airplane/compat/ServerConfigurations.java b/src/main/java/gg/airplane/compat/ServerConfigurations.java
new file mode 100644
index 0000000000000000000000000000000000000000..f4976428bc721319d2926e97cbe0f64c6e9e503c
--- /dev/null
+++ b/src/main/java/gg/airplane/compat/ServerConfigurations.java
@@ -0,0 +1,77 @@
+package gg.airplane.compat;
+
+import co.aikar.timings.TimingsManager;
+import com.google.common.io.Files;
+import org.bukkit.configuration.InvalidConfigurationException;
+import org.bukkit.configuration.file.YamlConfiguration;
+
+import java.io.ByteArrayOutputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Properties;
+import java.util.stream.Collectors;
+
+public class ServerConfigurations {
+
+    public static final String[] configurationFiles = new String[]{
+      "server.properties",
+      "bukkit.yml",
+      "spigot.yml",
+      "paper.yml",
+      "tuinity.yml",
+      "airplane.air"
+    };
+
+    public static String getCleanCopy(String configName) throws IOException {
+        File file = new File(configName);
+        List<String> hiddenConfigs = TimingsManager.hiddenConfigs;
+
+        if (configName.equals("airplane.air")) {
+            return Files.readLines(file, StandardCharsets.UTF_8)
+              .stream()
+              .filter(line -> !line.trim().startsWith("#"))
+              .map(line -> line.contains("token") ? "  token = **" : line)
+              .collect(Collectors.joining("\n"));
+        }
+
+        switch (Files.getFileExtension(configName)) {
+            case "properties": {
+                Properties properties = new Properties();
+                try (FileInputStream inputStream = new FileInputStream(file)) {
+                    properties.load(inputStream);
+                }
+                for (String hiddenConfig : hiddenConfigs) {
+                    properties.remove(hiddenConfig);
+                }
+                ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
+                properties.store(outputStream, "");
+                return Arrays.stream(outputStream.toString()
+                  .split("\n"))
+                  .filter(line -> !line.startsWith("#"))
+                  .collect(Collectors.joining("\n"));
+            }
+            case "yml": {
+                YamlConfiguration configuration = new YamlConfiguration();
+                try {
+                    configuration.load(file);
+                } catch (InvalidConfigurationException e) {
+                    throw new IOException(e);
+                }
+                configuration.options().header(null);
+                for (String key : configuration.getKeys(true)) {
+                    if (hiddenConfigs.contains(key)) {
+                        configuration.set(key, null);
+                    }
+                }
+                return configuration.saveToString();
+            }
+            default:
+                throw new IllegalArgumentException("Bad file type " + configName);
+        }
+    }
+
+}
diff --git a/src/main/java/gg/airplane/flare/FlareCommand.java b/src/main/java/gg/airplane/flare/FlareCommand.java
new file mode 100644
index 0000000000000000000000000000000000000000..ddc90f1589e683f452c5a74d9d2408803edea029
--- /dev/null
+++ b/src/main/java/gg/airplane/flare/FlareCommand.java
@@ -0,0 +1,149 @@
+package gg.airplane.flare;
+
+import com.google.common.collect.ImmutableList;
+import gg.airplane.AirplaneConfig;
+import gg.airplane.flare.exceptions.UserReportableException;
+import gg.airplane.flare.profiling.AsyncProfilerIntegration;
+import net.kyori.adventure.text.Component;
+import net.kyori.adventure.text.event.ClickEvent;
+import net.kyori.adventure.text.format.NamedTextColor;
+import net.kyori.adventure.text.format.TextColor;
+import net.kyori.adventure.text.format.TextDecoration;
+import org.bukkit.Bukkit;
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandSender;
+import org.bukkit.command.ConsoleCommandSender;
+import org.bukkit.craftbukkit.scheduler.MinecraftInternalPlugin;
+import org.bukkit.util.StringUtil;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+public class FlareCommand extends Command {
+
+    private static final String BASE_URL = "https://blog.airplane.gg/flare-tutorial/#setting-the-access-token";
+    private static final TextColor HEX = TextColor.fromHexString("#e3eaea");
+    private static final Component PREFIX = Component.text()
+      .append(Component.text("Flare ✈")
+        .color(TextColor.fromHexString("#6a7eda"))
+        .decoration(TextDecoration.BOLD, true)
+        .append(Component.text(" ", HEX)
+          .decoration(TextDecoration.BOLD, false)))
+      .asComponent();
+
+    public FlareCommand() {
+        super("flare", "Profile your server with Flare", "/flare", Collections.singletonList("profile"));
+        this.setPermission("airplane.flare");
+    }
+
+    @Override
+    public boolean execute(CommandSender sender, String commandLabel, String[] args) {
+        if (!testPermission(sender)) return true;
+        if (AirplaneConfig.accessToken.length() == 0) {
+            Component clickable = Component.text(BASE_URL, HEX, TextDecoration.UNDERLINED).clickEvent(ClickEvent.clickEvent(ClickEvent.Action.OPEN_URL, BASE_URL));
+
+            sender.sendMessage(PREFIX.append(Component.text("Flare currently requires an access token to use. To learn more, visit ").color(HEX).append(clickable)));
+            return true;
+        }
+
+        if (AsyncProfilerIntegration.doesNotSupportProfiling()) {
+            sender.sendMessage(PREFIX.append(
+              Component.text("Profiling is not supported in this environment, reason: " + AsyncProfilerIntegration.getDisabledReason(), NamedTextColor.RED)));
+            return true;
+        }
+        if (ProfilingManager.isProfiling()) {
+            if (args.length == 1 && args[0].equalsIgnoreCase("status")) {
+                sender.sendMessage(PREFIX.append(Component.text("Status: " + AsyncProfilerIntegration.status(), HEX)));
+                return true;
+            }
+            if (ProfilingManager.stop()) {
+                if (!(sender instanceof ConsoleCommandSender)) {
+                    sender.sendMessage(PREFIX.append(Component.text("Profiling has been stopped.", HEX)));
+                }
+            } else {
+                sender.sendMessage(PREFIX.append(Component.text("Profiling has already been stopped.", HEX)));
+            }
+        } else {
+            ProfileType profileType = null;
+            if (args.length > 0) {
+                try {
+                    profileType = ProfileType.valueOf(args[0].toUpperCase());
+                } catch (Exception e) {
+                    sender.sendMessage(PREFIX.append(Component
+                      .text("Invalid profile type ", HEX)
+                      .append(Component.text(args[0], HEX, TextDecoration.BOLD)
+                        .append(Component.text("!", HEX)))
+                    ));
+                }
+            }
+            int interval = 5;
+            if (args.length > 1) {
+                try {
+                    interval = Integer.parseInt(args[1]);
+                } catch (Exception e) {
+                    sender.sendMessage(PREFIX.append(Component
+                      .text("Invalid time in milliseconds ", HEX)
+                      .append(Component.text(args[1], HEX, TextDecoration.BOLD)
+                        .append(Component.text("!", HEX)))
+                    ));
+                    return true;
+                }
+            }
+            int finalInterval = interval;
+            ProfileType finalProfileType = profileType;
+            Bukkit.getScheduler().runTaskAsynchronously(new MinecraftInternalPlugin(), () -> {
+                try {
+                    if (ProfilingManager.start(finalProfileType, finalInterval)) {
+                        if (!(sender instanceof ConsoleCommandSender)) {
+                            sender.sendMessage(PREFIX.append(Component
+                              .text("Flare has been started: " + ProfilingManager.getProfilingUrl().get(), HEX)
+                              .clickEvent(ClickEvent.openUrl(ProfilingManager.getProfilingUrl().get()))
+                            ));
+                            sender.sendMessage(PREFIX.append(Component.text("  Run /" + commandLabel + " to stop the Flare.", HEX)));
+                        }
+                    } else {
+                        sender.sendMessage(PREFIX.append(Component
+                          .text("Flare has already been started: " + ProfilingManager.getProfilingUrl().get(), HEX)
+                          .clickEvent(ClickEvent.openUrl(ProfilingManager.getProfilingUrl().get()))
+                        ));
+                    }
+                } catch (UserReportableException e) {
+                    sender.sendMessage(Component.text("Flare failed to start: " + e.getUserError(), NamedTextColor.RED));
+                    e.printStackTrace();
+                }
+            });
+        }
+        return true;
+    }
+
+    @Override
+    public List<String> tabComplete(CommandSender sender, String alias, String[] args) throws IllegalArgumentException {
+        if (AsyncProfilerIntegration.doesNotSupportProfiling()) {
+            return ImmutableList.of();
+        }
+
+        List<String> list = new ArrayList<>();
+        if (AsyncProfilerIntegration.isProfiling()) {
+            if (args.length == 1) {
+                String lastWord = args[0];
+                if (StringUtil.startsWithIgnoreCase("status", lastWord)) {
+                    list.add("status");
+                }
+                if (StringUtil.startsWithIgnoreCase("stop", lastWord)) {
+                    list.add("stop");
+                }
+            }
+        } else {
+            if (args.length <= 1) {
+                String lastWord = args.length == 0 ? "" : args[0];
+                for (ProfileType value : ProfileType.values()) {
+                    if (StringUtil.startsWithIgnoreCase(value.getInternalName(), lastWord)) {
+                        list.add(value.name().toLowerCase());
+                    }
+                }
+            }
+        }
+        return list;
+    }
+}
diff --git a/src/main/java/gg/airplane/flare/FlareSetup.java b/src/main/java/gg/airplane/flare/FlareSetup.java
new file mode 100644
index 0000000000000000000000000000000000000000..27ac32779e700494aeca8b425edb2871d3ec29cc
--- /dev/null
+++ b/src/main/java/gg/airplane/flare/FlareSetup.java
@@ -0,0 +1,146 @@
+package gg.airplane.flare;
+
+import com.google.common.cache.Cache;
+import com.google.common.cache.CacheBuilder;
+import gg.airplane.AirplaneConfig;
+import gg.airplane.AirplaneLogger;
+import gg.airplane.compat.ServerConfigurations;
+import gg.airplane.flare.profiling.AsyncProfilerIntegration;
+import net.minecraft.server.MinecraftServer;
+import org.bukkit.Bukkit;
+import org.bukkit.craftbukkit.scheduler.MinecraftInternalPlugin;
+import org.bukkit.plugin.Plugin;
+import org.bukkit.plugin.java.PluginClassLoader;
+import org.bukkit.scheduler.BukkitTask;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.LinkedHashMap;
+import java.util.Map;
+import java.util.concurrent.TimeUnit;
+import java.util.logging.Level;
+
+public class FlareSetup {
+
+    public static void init() {
+        ServerConnector.connector = new ServerConnector() {
+
+            private final Cache<String, String> pluginNameCache = CacheBuilder.newBuilder()
+              .expireAfterAccess(1, TimeUnit.MINUTES)
+              .maximumSize(1024)
+              .build();
+
+            @Override
+            public String getPluginForClass(String name) {
+                if (name.contains(".") && name.charAt(0) != '/') {
+                    if (name.startsWith("net.minecraft") || name.startsWith("java.") || name.startsWith("com.mojang") || name.startsWith("com.google") || name.startsWith("it.unimi") || name.startsWith("sun")) {
+                        return null;
+                    }
+
+                    String className = name.substring(0, name.lastIndexOf("."));
+                    String existing = pluginNameCache.getIfPresent(name);
+                    if (existing != null) {
+                        return existing.isEmpty() ? null : existing;
+                    }
+
+                    String newValue = "";
+
+                    for (Plugin plugin : Bukkit.getPluginManager().getPlugins()) {
+                        ClassLoader classLoader = plugin.getClass().getClassLoader();
+                        if (classLoader instanceof PluginClassLoader) {
+                            try {
+                                Class<?> aClass = ((PluginClassLoader) classLoader)._airplane_findClass(className);
+                                if (aClass != null) {
+                                    newValue = plugin.getName();
+                                }
+                            } catch (ClassNotFoundException | IllegalAccessError e) {
+                            }
+                        }
+                    }
+
+                    pluginNameCache.put(name, newValue);
+                }
+                return null;
+            }
+
+            @Override
+            public Thread getMainThread() {
+                return MinecraftServer.getServer().serverThread;
+            }
+
+            @Override
+            public Map<String, String> getConfigurations() {
+                Map<String, String> map = new LinkedHashMap<>();
+                for (String configurationFile : ServerConfigurations.configurationFiles) {
+                    try {
+                        map.put(configurationFile, ServerConfigurations.getCleanCopy(configurationFile));
+                    } catch (IOException e) {
+                        this.log(Level.WARNING, "Failed to load config file " + configurationFile, e);
+                    }
+                }
+                return map;
+            }
+
+            @Override
+            public void log(Level level, String s) {
+                AirplaneLogger.LOGGER.log(level, s);
+            }
+
+            @Override
+            public void log(Level level, String s, Throwable throwable) {
+                AirplaneLogger.LOGGER.log(level, s, throwable);
+            }
+
+            @Override
+            public String getPrimaryVersion() {
+                return Bukkit.getVersion();
+            }
+
+            @Override
+            public String getApiVersion() {
+                return "bukkit:" + Bukkit.getBukkitVersion();
+            }
+
+            @Override
+            public String getMcVersion() {
+                return Bukkit.getMinecraftVersion();
+            }
+
+            private final Map<Runnable, BukkitTask> scheduledRunnables = new HashMap<>();
+
+            @Override
+            public void schedule(Runnable runnable, long l, long l1) {
+                BukkitTask task = Bukkit.getScheduler().runTaskTimer(new MinecraftInternalPlugin(), runnable, l, l1);
+                this.scheduledRunnables.put(runnable, task);
+            }
+
+            @Override
+            public void scheduleAsync(Runnable runnable, long l, long l1) {
+                BukkitTask task = Bukkit.getScheduler().runTaskTimerAsynchronously(new MinecraftInternalPlugin(), runnable, l, l1);
+                this.scheduledRunnables.put(runnable, task);
+            }
+
+            @Override
+            public void cancel(Runnable runnable) {
+                this.scheduledRunnables.get(runnable).cancel();
+            }
+
+            @Override
+            public void runAsync(Runnable runnable) {
+                Bukkit.getScheduler().runTaskAsynchronously(new MinecraftInternalPlugin(), runnable);
+            }
+
+            @Override
+            public String getWebUrl() {
+                return AirplaneConfig.profileWebUrl;
+            }
+
+            @Override
+            public String getToken() {
+                return AirplaneConfig.accessToken;
+            }
+        };
+        AsyncProfilerIntegration.init();
+    }
+
+}
diff --git a/src/main/java/gg/airplane/flare/ProfilingManager.java b/src/main/java/gg/airplane/flare/ProfilingManager.java
new file mode 100644
index 0000000000000000000000000000000000000000..86d6650d174a7794a7ebe793cad033b42215c321
--- /dev/null
+++ b/src/main/java/gg/airplane/flare/ProfilingManager.java
@@ -0,0 +1,65 @@
+package gg.airplane.flare;
+
+import gg.airplane.AirplaneConfig;
+import gg.airplane.AirplaneLogger;
+import gg.airplane.flare.exceptions.UserReportableException;
+import gg.airplane.flare.profiling.ProfileController;
+import org.bukkit.Bukkit;
+import org.bukkit.craftbukkit.scheduler.MinecraftInternalPlugin;
+import org.bukkit.scheduler.BukkitTask;
+
+import javax.annotation.Nullable;
+import java.util.Optional;
+import java.util.logging.Level;
+
+public class ProfilingManager {
+
+    private static ProfileController currentController;
+    private static BukkitTask currentTask = null;
+
+    public static synchronized boolean isProfiling() {
+        return currentController != null;
+    }
+
+    public static synchronized Optional<String> getProfilingUrl() {
+        if (!isProfiling()) {
+            return Optional.empty();
+        }
+        return Optional.of(AirplaneConfig.profileWebUrl + "/" + currentController.getId());
+    }
+
+    public static synchronized boolean start(@Nullable ProfileType type, int interval) throws UserReportableException {
+        if (isProfiling()) {
+            return false;
+        }
+        if (Bukkit.isPrimaryThread()) {
+            throw new UserReportableException("Profiles should be started off-thread");
+        }
+        currentController = new ProfileController(type, Math.max(interval, 1)); // don't allow lower than 20ms: https://bugzilla.redhat.com/show_bug.cgi?id=645528
+        currentTask = Bukkit.getScheduler().runTaskLater(new MinecraftInternalPlugin(), ProfilingManager::stop, 20 * 60 * 15);
+        AirplaneLogger.LOGGER.log(Level.INFO, "Flare has been started: " + getProfilingUrl().orElse("An error occurred retrieving the Flare URL."));
+        return true;
+    }
+
+    public static synchronized boolean stop() {
+        if (!isProfiling()) {
+            return false;
+        }
+        AirplaneLogger.LOGGER.log(Level.INFO, "Flare has been stopped: " + getProfilingUrl().orElse("An error occurred retrieving the Flare URL."));
+        try {
+            currentController.cancel();
+        } catch (Throwable t) {
+            AirplaneLogger.LOGGER.log(Level.WARNING, "Error occurred stopping Flare", t);
+        }
+        currentController = null;
+
+        try {
+            currentTask.cancel();
+        } catch (Throwable t) {
+            AirplaneLogger.LOGGER.log(Level.WARNING, "Error occurred stopping Flare", t);
+        }
+        currentTask = null;
+        return true;
+    }
+
+}
diff --git a/src/main/java/gg/airplane/structs/FluidDirectionCache.java b/src/main/java/gg/airplane/structs/FluidDirectionCache.java
new file mode 100644
index 0000000000000000000000000000000000000000..11279fb136bbaf3e51d9b080a9e283d8ff0cbb47
--- /dev/null
+++ b/src/main/java/gg/airplane/structs/FluidDirectionCache.java
@@ -0,0 +1,142 @@
+package gg.airplane.structs;
+
+import it.unimi.dsi.fastutil.HashCommon;
+
+/**
+ * This is a replacement for the cache used in FluidTypeFlowing.
+ * The requirements for the previous cache were:
+ *  - Store 200 entries
+ *  - Look for the flag in the cache
+ *  - If it exists, move to front of cache
+ *  - If it doesn't exist, remove last entry in cache and insert in front
+ *
+ * This class accomplishes something similar, however has a few different
+ * requirements put into place to make this more optimize:
+ *
+ *  - maxDistance is the most amount of entries to be checked, instead
+ *    of having to check the entire list.
+ *  - In combination with that, entries are all tracked by age and how
+ *    frequently they're used. This enables us to remove old entries,
+ *    without constantly shifting any around.
+ *
+ * Usage of the previous map would have to reset the head every single usage,
+ * shifting the entire map. Here, nothing happens except an increment when
+ * the cache is hit, and when it needs to replace an old element only a single
+ * element is modified.
+ */
+public class FluidDirectionCache<T> {
+
+    private static class FluidDirectionEntry<T> {
+        private final T data;
+        private final boolean flag;
+        private short uses = 0;
+        private short age = 0;
+
+        private FluidDirectionEntry(T data, boolean flag) {
+            this.data = data;
+            this.flag = flag;
+        }
+
+        public int getValue() {
+            return this.uses - (this.age >> 1); // age isn't as important as uses
+        }
+
+        public void incrementUses() {
+            if (this.uses < Short.MAX_VALUE) {
+                this.uses++;
+            }
+        }
+
+        public void incrementAge() {
+            if (this.age < Short.MAX_VALUE) {
+                this.age++;
+            }
+        }
+    }
+
+    private final FluidDirectionEntry[] entries;
+    private final int mask;
+    private final int maxDistance; // the most amount of entries to check for a value
+
+    public FluidDirectionCache(int size) {
+        float fill = 0.75f;
+
+        int arraySize = HashCommon.arraySize(size, fill);
+        this.entries = new FluidDirectionEntry[arraySize];
+        this.mask = arraySize - 1;
+        this.maxDistance = Math.max(4, arraySize >> 4);
+    }
+
+    public Boolean getValue(T data) {
+        FluidDirectionEntry curr;
+        int pos;
+
+        if ((curr = this.entries[pos = HashCommon.mix(data.hashCode()) & this.mask]) == null) {
+            return null;
+        } else if (data.equals(curr.data)) {
+            curr.incrementUses();
+            return curr.flag;
+        }
+
+        int checked = 1; // start at 1 because we already checked the first spot above
+
+        while ((curr = this.entries[pos = (pos + 1) & this.mask]) != null) {
+            if (data.equals(curr.data)) {
+                curr.incrementUses();
+                return curr.flag;
+            } else if (++checked >= this.maxDistance) {
+                break;
+            }
+        }
+
+        return null;
+    }
+
+    public void putValue(T data, boolean flag) {
+        FluidDirectionEntry<T> curr;
+        int pos;
+
+        if ((curr = this.entries[pos = HashCommon.mix(data.hashCode()) & this.mask]) == null) {
+            this.entries[pos] = new FluidDirectionEntry<>(data, flag); // add
+            return;
+        } else if (data.equals(curr.data)) {
+            curr.incrementUses();
+            return;
+        }
+
+        int checked = 1; // start at 1 because we already checked the first spot above
+
+        while ((curr = this.entries[pos = (pos + 1) & this.mask]) != null) {
+            if (data.equals(curr.data)) {
+                curr.incrementUses();
+                return;
+            } else if (++checked >= this.maxDistance) {
+                this.forceAdd(data, flag);
+                return;
+            }
+        }
+
+        this.entries[pos] = new FluidDirectionEntry<>(data, flag); // add
+    }
+
+    private void forceAdd(T data, boolean flag) {
+        int expectedPos = HashCommon.mix(data.hashCode()) & this.mask;
+
+        int toRemovePos = expectedPos;
+        FluidDirectionEntry<T> entryToRemove = this.entries[toRemovePos];
+
+        for (int i = expectedPos + 1; i < expectedPos + this.maxDistance; i++) {
+            int pos = i & this.mask;
+            FluidDirectionEntry<T> entry = this.entries[pos];
+            if (entry.getValue() < entryToRemove.getValue()) {
+                toRemovePos = pos;
+                entryToRemove = entry;
+            }
+
+            entry.incrementAge(); // use this as a mechanism to age the other entries
+        }
+
+        // remove the least used/oldest entry
+        this.entries[toRemovePos] = new FluidDirectionEntry(data, flag);
+    }
+}
diff --git a/src/main/java/net/minecraft/core/BlockPosition.java b/src/main/java/net/minecraft/core/BlockPosition.java
index 8edc279e7a3fdfb7e10718f1deee34b7e3fb2f28..3c51ee00aa53e561c02bb779c7115d8475d70ed7 100644
--- a/src/main/java/net/minecraft/core/BlockPosition.java
+++ b/src/main/java/net/minecraft/core/BlockPosition.java
@@ -438,12 +438,26 @@ public class BlockPosition extends BaseBlockPosition {
         public BlockPosition b(int i, int j, int k) {
             return super.b(i, j, k).immutableCopy();
         }
+        // Airplane start - version of b that doesn't copy
+        public BlockPosition addValues(int x, int y, int z) {
+            ((BaseBlockPosition)this).a += x;
+            ((BaseBlockPosition)this).b += y;
+            ((BaseBlockPosition)this).e += z;
+            return this;
+        }
+        // Airplane end
 
         @Override
         public BlockPosition shift(EnumDirection enumdirection, int i) {
             return super.shift(enumdirection, i).immutableCopy();
         }
 
+        // Airplane start - mutable shift method
+        public MutableBlockPosition mutableShift(EnumDirection enumdirection, int i) {
+            return this.setValues(this.getX() + enumdirection.getAdjacentX() * i, this.getY() + enumdirection.getAdjacentY() * i, this.getZ() + enumdirection.getAdjacentZ() * i);
+        }
+        // Airplane end
+
         @Override
         public BlockPosition a(EnumDirection.EnumAxis enumdirection_enumaxis, int i) {
             return super.a(enumdirection_enumaxis, i).immutableCopy();
diff --git a/src/main/java/net/minecraft/core/EnumDirection.java b/src/main/java/net/minecraft/core/EnumDirection.java
index 7918d830a4aef09c9f517284e83a9376299116ad..0a40df2151bd388b6633a6f50b14f1f41ed4ce62 100644
--- a/src/main/java/net/minecraft/core/EnumDirection.java
+++ b/src/main/java/net/minecraft/core/EnumDirection.java
@@ -30,7 +30,7 @@ public enum EnumDirection implements INamable {
     private final EnumDirection.EnumAxis k;
     private final EnumDirection.EnumAxisDirection l;
     private final BaseBlockPosition m;
-    private static final EnumDirection[] n = values();
+    private static final EnumDirection[] n = values(); public static EnumDirection[] getValues() { return n; } // Airplane - getter
     private static final Map<String, EnumDirection> o = (Map) Arrays.stream(EnumDirection.n).collect(Collectors.toMap(EnumDirection::m, (enumdirection) -> {
         return enumdirection;
     }));
diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
index 2767a9369ddc922f1d9c7cb6c7acc8270545535a..2bb00a42492b08036e984d3e1d9a564d4b4226c2 100644
--- a/src/main/java/net/minecraft/server/MinecraftServer.java
+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
@@ -1646,7 +1646,7 @@ public abstract class MinecraftServer extends IAsyncTaskHandlerReentrant<TickTas
     }
 
     public String getServerModName() {
-        return "Tuinity"; // Tuinity //Paper - Paper > // Spigot - Spigot > // CraftBukkit - cb > vanilla!
+        return "Airplane"; // Airplane // Tuinity //Paper - Paper > // Spigot - Spigot > // CraftBukkit - cb > vanilla!
     }
 
     public CrashReport b(CrashReport crashreport) {
@@ -2196,7 +2196,11 @@ public abstract class MinecraftServer extends IAsyncTaskHandlerReentrant<TickTas
         }
     }
 
+    // Airplane start
+    private final GameProfilerFiller disabledProfiler = net.minecraft.util.profiling.GameProfilerDisabled.a;
     public GameProfilerFiller getMethodProfiler() {
+        if (gg.airplane.AirplaneConfig.disableMethodProfiler) return disabledProfiler;
+        // Airplane end
         return this.methodProfiler;
     }
 
diff --git a/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java b/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java
index fa7a78549a9bb92b93c305dc16f43a9ace7f6f43..858bd62d2a17c15ee573c5cd607a876d3a99c2b1 100644
--- a/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java
+++ b/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java
@@ -216,6 +216,8 @@ public class DedicatedServer extends MinecraftServer implements IMinecraftServer
         io.papermc.paper.brigadier.PaperBrigadierProviderImpl.INSTANCE.getClass(); // init PaperBrigadierProvider
         // Paper end
         com.tuinity.tuinity.config.TuinityConfig.init((java.io.File) options.valueOf("tuinity-settings")); // Tuinity - Server Config
+        gg.airplane.AirplaneConfig.load(); // Airplane - config
+        gg.airplane.commands.AirplaneCommands.init(); // Airplane - command
 
         this.setPVP(dedicatedserverproperties.pvp);
         this.setAllowFlight(dedicatedserverproperties.allowFlight);
diff --git a/src/main/java/net/minecraft/server/level/ChunkMapDistance.java b/src/main/java/net/minecraft/server/level/ChunkMapDistance.java
index a5fc023312c99e591fc269999c28a766a46f8849..fb4d006f86229fd093f1a9ea8cab2add0a4cacfa 100644
--- a/src/main/java/net/minecraft/server/level/ChunkMapDistance.java
+++ b/src/main/java/net/minecraft/server/level/ChunkMapDistance.java
@@ -215,7 +215,7 @@ public abstract class ChunkMapDistance {
     public boolean a(PlayerChunkMap playerchunkmap) {
         com.tuinity.tuinity.util.TickThread.softEnsureTickThread("Cannot tick ChunkMapDistance off of the main-thread");// Tuinity
         //this.f.a(); // Paper - no longer used
-        AsyncCatcher.catchOp("DistanceManagerTick"); // Paper
+        //AsyncCatcher.catchOp("DistanceManagerTick"); // Paper // Airplane - leave up to softEnsures
         //this.g.a(); // Tuinity - no longer used
         boolean flag = this.ticketLevelPropagator.propagateUpdates(); // Tuinity - replace ticket level propagator
 
diff --git a/src/main/java/net/minecraft/server/level/ChunkProviderServer.java b/src/main/java/net/minecraft/server/level/ChunkProviderServer.java
index fe040615ff03478a20cdf8376f89a6b7d100ba61..207a9c3928aad7c6e89a120b54d87e003ebd232c 100644
--- a/src/main/java/net/minecraft/server/level/ChunkProviderServer.java
+++ b/src/main/java/net/minecraft/server/level/ChunkProviderServer.java
@@ -1000,6 +1000,7 @@ public class ChunkProviderServer extends IChunkProvider {
             }
             // Paper end - optimize isOutisdeRange
             this.world.getMethodProfiler().enter("pollingChunks");
+            this.world.resetIceAndSnowTick(); // Airplane - reset ice & snow tick random
             int k = this.world.getGameRules().getInt(GameRules.RANDOM_TICK_SPEED);
             boolean flag2 = world.ticksPerAnimalSpawns != 0L && worlddata.getTime() % world.ticksPerAnimalSpawns == 0L; // CraftBukkit
 
diff --git a/src/main/java/net/minecraft/server/level/PlayerChunk.java b/src/main/java/net/minecraft/server/level/PlayerChunk.java
index 86f156587a0939b28c5cf6f64907255c1c4f8b35..06157bb07cce3ba24087ceaca7138b5609b37b5b 100644
--- a/src/main/java/net/minecraft/server/level/PlayerChunk.java
+++ b/src/main/java/net/minecraft/server/level/PlayerChunk.java
@@ -58,6 +58,7 @@ public class PlayerChunk {
     private int ticketLevel; public final void setTicketLevel(final int level) { this.ticketLevel = level; } // Tuinity - OBFHELPER
     volatile int n; public final int getCurrentPriority() { return n; } // Paper - OBFHELPER - make volatile since this is concurrently accessed
     public final ChunkCoordIntPair location; // Paper - private -> public
+    private final long coordinateKey; // Airplane - cache key for location
     private boolean p;
     private final ShortSet[] dirtyBlocks;
     private int r;
@@ -80,7 +81,7 @@ public class PlayerChunk {
     com.destroystokyo.paper.util.misc.PooledLinkedHashSets.PooledObjectLinkedOpenHashSet<EntityPlayer> playersInChunkTickRange;
 
     void updateRanges() {
-        long key = net.minecraft.server.MCUtil.getCoordinateKey(this.location);
+        long key = this.coordinateKey; //net.minecraft.server.MCUtil.getCoordinateKey(this.location); // Airplane - use cached key
         this.playersInMobSpawnRange = this.chunkMap.playerMobSpawnMap.getObjectsInRange(key);
         this.playersInChunkTickRange = this.chunkMap.playerChunkTickRangeMap.getObjectsInRange(key);
         // Tuinity start - optimise checkDespawn
@@ -232,7 +233,7 @@ public class PlayerChunk {
         this.entityTickingFuture = PlayerChunk.UNLOADED_CHUNK_FUTURE;
         this.chunkSave = CompletableFuture.completedFuture(null); // CraftBukkit - decompile error
         this.dirtyBlocks = new ShortSet[16];
-        this.location = chunkcoordintpair;
+        this.location = chunkcoordintpair; this.coordinateKey = net.minecraft.server.MCUtil.getCoordinateKey(this.location); // Airplane
         this.lightEngine = lightengine;
         this.u = playerchunk_c;
         this.players = playerchunk_d;
diff --git a/src/main/java/net/minecraft/server/level/PlayerChunkMap.java b/src/main/java/net/minecraft/server/level/PlayerChunkMap.java
index b28995ecfd7f45e6b6197be96c418aa0d05d3383..914c7a1b18151f29183cfe9474313ce18e7c4ae2 100644
--- a/src/main/java/net/minecraft/server/level/PlayerChunkMap.java
+++ b/src/main/java/net/minecraft/server/level/PlayerChunkMap.java
@@ -705,7 +705,9 @@ public class PlayerChunkMap extends IChunkLoader implements PlayerChunk.d {
         return d2 * d2 + d3 * d3;
     }
 
-    private static int b(ChunkCoordIntPair chunkcoordintpair, EntityPlayer entityplayer, boolean flag) {
+    // Airplane start - create copy that accepts x/z instead of allocating pair
+    private static int b(ChunkCoordIntPair chunkcoordintpair, EntityPlayer entityplayer, boolean flag) { return someDistanceCalculation(chunkcoordintpair.x, chunkcoordintpair.z, entityplayer, flag); }
+    private static int someDistanceCalculation(int x, int z, EntityPlayer entityplayer, boolean flag) {
         int i;
         int j;
 
@@ -719,12 +721,16 @@ public class PlayerChunkMap extends IChunkLoader implements PlayerChunk.d {
             j = MathHelper.floor(entityplayer.locZ() / 16.0D);
         }
 
-        return a(chunkcoordintpair, i, j);
+        return someOtherDistanceCalculation(x, z, i, j);
+        // Airplane end
     }
 
-    private static int a(ChunkCoordIntPair chunkcoordintpair, int i, int j) {
-        int k = chunkcoordintpair.x - i;
-        int l = chunkcoordintpair.z - j;
+    // Airplane start - create copy that accepts x/z instead of allocating pair
+    private static int a(ChunkCoordIntPair chunkcoordintpair, int i, int j) { return someOtherDistanceCalculation(chunkcoordintpair.x, chunkcoordintpair.z, i, j); }
+    private static int someOtherDistanceCalculation(int x, int z, int i, int j) {
+        int k = x - i;
+        int l = z - j;
+        // Airplane end
 
         return Math.max(Math.abs(k), Math.abs(l));
     }
@@ -2541,11 +2547,17 @@ Sections go from 0..16. Now whenever a section is not empty, it can potentially
                     boolean flag1 = this.tracker.attachedToPlayer;
 
                     if (!flag1) {
+                        // Airplane start - use int/longs instead of ChunkCoordIntPair
+                        /*
                         ChunkCoordIntPair chunkcoordintpair = new ChunkCoordIntPair(this.tracker.chunkX, this.tracker.chunkZ);
-                        PlayerChunk playerchunk = PlayerChunkMap.this.getVisibleChunk(chunkcoordintpair.pair());
+                         */
+                        int x = this.tracker.chunkX, z = this.tracker.chunkZ;
+                        long chunkcoordintpair = ChunkCoordIntPair.pair(x, z);
+                        PlayerChunk playerchunk = PlayerChunkMap.this.getVisibleChunk(chunkcoordintpair);
 
                         if (playerchunk != null && playerchunk.getSendingChunk() != null && PlayerChunkMap.this.playerChunkManager.isChunkSent(entityplayer, MathHelper.floor(this.tracker.locX()) >> 4, MathHelper.floor(this.tracker.locZ()) >> 4)) { // Paper - no-tick view distance // Tuinity - don't broadcast in chunks the player hasn't received
-                            flag1 = PlayerChunkMap.b(chunkcoordintpair, entityplayer, false) <= PlayerChunkMap.this.viewDistance;
+                            flag1 = PlayerChunkMap.someDistanceCalculation(x, z, entityplayer, false) <= PlayerChunkMap.this.viewDistance;
+                            // Airplane end
                         }
                     }
 
@@ -2575,8 +2587,10 @@ Sections go from 0..16. Now whenever a section is not empty, it can potentially
         }
 
         private int b() {
+            // Airplane start
+            int i = this.trackingDistance; // move out of if statement
+            if (!this.tracker.passengers.isEmpty()) {
             Collection<Entity> collection = this.tracker.getAllPassengers();
-            int i = this.trackingDistance;
             Iterator iterator = collection.iterator();
 
             while (iterator.hasNext()) {
@@ -2588,6 +2602,8 @@ Sections go from 0..16. Now whenever a section is not empty, it can potentially
                     i = j;
                 }
             }
+            }
+            // Airplane end
 
             return this.a(i);
         }
diff --git a/src/main/java/net/minecraft/server/level/WorldServer.java b/src/main/java/net/minecraft/server/level/WorldServer.java
index 58e61aa19d71011c40c69a691f5644b3e823ad68..51bb2502e4efb052f55de6eabce07f59e936c9d9 100644
--- a/src/main/java/net/minecraft/server/level/WorldServer.java
+++ b/src/main/java/net/minecraft/server/level/WorldServer.java
@@ -1107,7 +1107,28 @@ public class WorldServer extends World implements GeneratorAccessSeed {
 
                 gameprofilerfiller.enter("tick");
                 if (!entity.dead && !(entity instanceof EntityComplexPart)) {
+                    // Airplane start - inline this.a to prevent creation of lambda
+                    /*
                     this.a(this::entityJoinedWorld, entity);
+                     */
+                    boolean doMidTick = false; // usually there's a returns in the catch, so treat it like that
+                    try {
+                        this.entityJoinedWorld(entity);
+                        doMidTick = true;
+                    } catch (Throwable throwable) {
+                        if (throwable instanceof ThreadDeath) throw throwable; // Paper
+                        // Paper start - Prevent tile entity and entity crashes
+                        String msg = "Entity threw exception at " + entity.world.getWorld().getName() + ":" + entity.locX() + "," + entity.locY() + "," + entity.locZ();
+                        System.err.println(msg);
+                        throwable.printStackTrace();
+                        getServer().getPluginManager().callEvent(new com.destroystokyo.paper.event.server.ServerExceptionEvent(new com.destroystokyo.paper.exception.ServerInternalException(msg, throwable)));
+                        entity.dead = true;
+                        // Paper end
+                    }
+                    if (doMidTick) {
+                        MinecraftServer.getServer().executeMidTickTasks(); // Tuinity - execute chunk tasks mid tick
+                    }
+                    // Airplane end
                 }
 
                 gameprofilerfiller.exit();
@@ -1202,6 +1223,8 @@ public class WorldServer extends World implements GeneratorAccessSeed {
     private final BiomeBase[] biomeBaseCache = new BiomeBase[1];
     // Tuinity end - optimise chunk ice snow ticking
 
+    private int currentIceAndSnowTick = 0; protected void resetIceAndSnowTick() { this.currentIceAndSnowTick = this.randomTickRandom.nextInt(16); } // Airplane
+
     public void a(Chunk chunk, int i) { final int randomTickSpeed = i; // Paper
         ChunkCoordIntPair chunkcoordintpair = chunk.getPos();
         boolean flag = this.isRaining();
@@ -1212,7 +1235,7 @@ public class WorldServer extends World implements GeneratorAccessSeed {
         gameprofilerfiller.enter("thunder");
         final BlockPosition.MutableBlockPosition blockposition = this.chunkTickMutablePosition; // Paper - use mutable to reduce allocation rate, final to force compile fail on change
 
-        if (!this.paperConfig.disableThunder && flag && this.W() && this.random.nextInt(100000) == 0) { // Paper - Disable thunder
+        if (!this.paperConfig.disableThunder && flag && chunk.shouldDoLightning(this.random) && this.W()) { // Paper - Disable thunder // Airplane - check this.W last // Airplane - replace random with shouldDoLighting
             blockposition.setValues(this.a(this.a(j, 0, k, 15))); // Paper
             if (this.isRainingAt(blockposition)) {
                 DifficultyDamageScaler difficultydamagescaler = this.getDamageScaler(blockposition);
@@ -1236,7 +1259,7 @@ public class WorldServer extends World implements GeneratorAccessSeed {
         }
 
         gameprofilerfiller.exitEnter("iceandsnow");
-        if (!this.paperConfig.disableIceAndSnow && this.randomTickRandom.nextInt(16) == 0) { // Paper - Disable ice and snow // Paper - optimise random ticking
+        if (!this.paperConfig.disableIceAndSnow && (this.currentIceAndSnowTick++ & 15) == 0) { // Paper - Disable ice and snow // Paper - optimise random ticking // Airplane - optimize further random ticking
             // Paper start - optimise chunk ticking
             // Tuinity start - optimise chunk ice snow ticking
             BiomeBase[] biomeCache = this.biomeBaseCache;
@@ -1449,9 +1472,14 @@ public class WorldServer extends World implements GeneratorAccessSeed {
                 ++entity.ticksLived;
                 GameProfilerFiller gameprofilerfiller = this.getMethodProfiler();
 
+                // Airplane start - create debug lambda once, todo do we even WANT the method profiler?
+                /*
                 gameprofilerfiller.a(() -> {
                     return IRegistry.ENTITY_TYPE.getKey(entity.getEntityType()).toString();
                 });
+                 */
+                gameprofilerfiller.a(entity.getEntityType().getEntityName);
+                // Airplane end
                 gameprofilerfiller.c("tickNonPassenger");
                 if (isActive) { // Paper - EAR 2
                     TimingHistory.activatedEntityTicks++; // Paper
diff --git a/src/main/java/net/minecraft/util/MathHelper.java b/src/main/java/net/minecraft/util/MathHelper.java
index cc566784c7dd21cc2c44e0f351347f657e57ddcf..e9e7fcf2b63febe2a7d055826fabb86bc13a5cf3 100644
--- a/src/main/java/net/minecraft/util/MathHelper.java
+++ b/src/main/java/net/minecraft/util/MathHelper.java
@@ -240,6 +240,7 @@ public class MathHelper {
         return f - (float) d(f);
     }
 
+    public static double getDecimals(double num) { return h(num); } // Airplane
     public static double h(double d0) {
         return d0 - (double) d(d0);
     }
@@ -418,6 +419,7 @@ public class MathHelper {
         return f1 + f * (f2 - f1);
     }
 
+    public static double linearInterpolation(double value1, double value2, double amount) { return d(value1, value2, amount); } // Airplane - OBFHELPER
     public static double d(double d0, double d1, double d2) {
         return d1 + d0 * (d2 - d1);
     }
@@ -434,6 +436,7 @@ public class MathHelper {
         return d0 * d0 * d0 * (d0 * (d0 * 6.0D - 15.0D) + 10.0D);
     }
 
+    public static int sign(double num) { return k(num); } // Airplane - OBFHELPER
     public static int k(double d0) {
         return d0 == 0.0D ? 0 : (d0 > 0.0D ? 1 : -1);
     }
diff --git a/src/main/java/net/minecraft/world/entity/Entity.java b/src/main/java/net/minecraft/world/entity/Entity.java
index feab0ae1930b5271fe0d06a40c180317dcbc9d1d..99c93d48726b4b92a341ba98721173df8b4ff30a 100644
--- a/src/main/java/net/minecraft/world/entity/Entity.java
+++ b/src/main/java/net/minecraft/world/entity/Entity.java
@@ -289,6 +289,9 @@ public abstract class Entity implements INamableTileEntity, ICommandListener, ne
     public void inactiveTick() { }
     // Spigot end
     public boolean shouldBeRemoved; // Paper
+    // Airplane start
+    public int activatedPriority = gg.airplane.AirplaneConfig.maximumActivationPrio; // golf score
+    // Airplane end
 
     public float getBukkitYaw() {
         return this.yaw;
@@ -316,10 +319,39 @@ public abstract class Entity implements INamableTileEntity, ICommandListener, ne
         this.isLegacyTrackingEntity = isLegacyTrackingEntity;
     }
 
+    // Airplane start - behavior of getAllPassengers + getting bigger range
+    private org.spigotmc.TrackingRange.TrackingRangeType getBiggestRangeOfPassengers(net.minecraft.server.level.PlayerChunkMap chunkMap, int[] range, Entity entity) {
+        org.spigotmc.TrackingRange.TrackingRangeType type = null;
+
+        for (int i = 0; i < entity.passengers.size(); i++) {
+            Entity passenger = entity.passengers.get(i);
+            org.spigotmc.TrackingRange.TrackingRangeType passengerType = passenger.trackingRangeType;
+            int passengerRange = chunkMap.getEntityTrackerRange(passengerType.ordinal());
+            if (passengerRange > range[0]) {
+                type = passengerType;
+                range[0] = passengerRange;
+            }
+
+            org.spigotmc.TrackingRange.TrackingRangeType childType = this.getBiggestRangeOfPassengers(chunkMap, range, passenger);
+            if (childType != null) {
+                type = childType;
+            }
+        }
+
+        return type;
+    }
+    // Airplane end
+
     public final com.destroystokyo.paper.util.misc.PooledLinkedHashSets.PooledObjectLinkedOpenHashSet<EntityPlayer> getPlayersInTrackRange() {
+        // Airplane start - replicate behavior of getAllPassengers to skip creating hashset
+        /*
         Collection<Entity> passengers = this.getAllPassengers();
+        */
         net.minecraft.server.level.PlayerChunkMap chunkMap = ((WorldServer)this.world).getChunkProvider().playerChunkMap;
         org.spigotmc.TrackingRange.TrackingRangeType type = this.trackingRangeType;
+        type = this.getBiggestRangeOfPassengers(chunkMap, new int[]{chunkMap.getEntityTrackerRange(type.ordinal())}, this);
+        if (type == null) type = this.trackingRangeType;
+        /*
         int range = chunkMap.getEntityTrackerRange(type.ordinal());
 
         for (Entity passenger : passengers) {
@@ -330,8 +362,10 @@ public abstract class Entity implements INamableTileEntity, ICommandListener, ne
                 range = passengerRange;
             }
         }
+         */
+        // Airplane end
 
-        return chunkMap.playerEntityTrackerTrackMaps[type.ordinal()].getObjectsInRange(MCUtil.getCoordinateKey(this));
+        return chunkMap.playerEntityTrackerTrackMaps[type.ordinal()].getObjectsInRange(MCUtil.getCoordinateKey(this.chunkX, this.chunkZ)); // Airplane - don't convert doubles to ints here
     }
     // Paper end - optimise entity tracking
 
diff --git a/src/main/java/net/minecraft/world/entity/EntityInsentient.java b/src/main/java/net/minecraft/world/entity/EntityInsentient.java
index aae13c2e6c2a30b69c33417932c6a4d0aefeb7f5..dc78bafeddf6b584181c818b90efa7ff531377a3 100644
--- a/src/main/java/net/minecraft/world/entity/EntityInsentient.java
+++ b/src/main/java/net/minecraft/world/entity/EntityInsentient.java
@@ -201,10 +201,10 @@ public abstract class EntityInsentient extends EntityLiving {
     @Override
     public void inactiveTick() {
         super.inactiveTick();
-        if (this.goalSelector.inactiveTick()) {
+        if (this.goalSelector.inactiveTick(this.activatedPriority)) { // Airplane - pass activated priroity
             this.goalSelector.doTick();
         }
-        if (this.targetSelector.inactiveTick()) {
+        if (this.targetSelector.inactiveTick(this.activatedPriority)) { // Airplane - pass activated priority
             this.targetSelector.doTick();
         }
     }
@@ -774,8 +774,15 @@ public abstract class EntityInsentient extends EntityLiving {
         return false;
     }
 
+    // Airplane start - just reduce frequency of checking for despawn
+    private byte despawnCheck = 0;
     @Override
     public void checkDespawn() {
+        if (++despawnCheck < gg.airplane.AirplaneConfig.entityDespawnCheckFrequency) {
+            return;
+        }
+        this.despawnCheck = 0;
+        // Airplane end
         if (this.world.getDifficulty() == EnumDifficulty.PEACEFUL && this.L()) {
             this.die();
         } else if (!this.isPersistent() && !this.isSpecialPersistence()) {
@@ -829,9 +836,11 @@ public abstract class EntityInsentient extends EntityLiving {
         this.bo.a();
         this.world.getMethodProfiler().exit();
         this.world.getMethodProfiler().enter("targetSelector");
+        if (this.targetSelector.inactiveTick(this.activatedPriority)) // Airplane - use this to alternate ticking
         this.targetSelector.doTick();
         this.world.getMethodProfiler().exit();
         this.world.getMethodProfiler().enter("goalSelector");
+        if (this.goalSelector.inactiveTick(this.activatedPriority)) // Airplane - use this to alternate ticking
         this.goalSelector.doTick();
         this.world.getMethodProfiler().exit();
         this.world.getMethodProfiler().enter("navigation");
diff --git a/src/main/java/net/minecraft/world/entity/EntityLiving.java b/src/main/java/net/minecraft/world/entity/EntityLiving.java
index 96cc46a26eef701b0579f3407e67af9176e1743b..003e1f6dc8efbabcb2e0f7a6b379196f02203903 100644
--- a/src/main/java/net/minecraft/world/entity/EntityLiving.java
+++ b/src/main/java/net/minecraft/world/entity/EntityLiving.java
@@ -111,6 +111,7 @@ import net.minecraft.world.phys.AxisAlignedBB;
 import net.minecraft.world.phys.MovingObjectPosition;
 import net.minecraft.world.phys.MovingObjectPositionEntity;
 import net.minecraft.world.phys.Vec3D;
+import net.minecraft.world.phys.shapes.VoxelShapeCollision;
 import net.minecraft.world.scores.ScoreboardTeam;
 import org.apache.logging.log4j.Logger;
 
@@ -909,11 +910,13 @@ public abstract class EntityLiving extends Entity {
         }
 
         if (entity != null) {
-            ItemStack itemstack = this.getEquipment(EnumItemSlot.HEAD);
-            Item item = itemstack.getItem();
+            // Airplane start - don't get equipment if not needed
+            //ItemStack itemstack = this.getEquipment(EnumItemSlot.HEAD);
+            //Item item = itemstack.getItem();
             EntityTypes<?> entitytypes = entity.getEntityType();
 
-            if (entitytypes == EntityTypes.SKELETON && item == Items.SKELETON_SKULL || entitytypes == EntityTypes.ZOMBIE && item == Items.ZOMBIE_HEAD || entitytypes == EntityTypes.CREEPER && item == Items.CREEPER_HEAD) {
+            if (entitytypes == EntityTypes.SKELETON && this.getEquipment(EnumItemSlot.HEAD).getItem() == Items.SKELETON_SKULL || entitytypes == EntityTypes.ZOMBIE && this.getEquipment(EnumItemSlot.HEAD).getItem() == Items.ZOMBIE_HEAD || entitytypes == EntityTypes.CREEPER && this.getEquipment(EnumItemSlot.HEAD).getItem() == Items.CREEPER_HEAD) {
+                // Airplane end
                 d0 *= 0.5D;
             }
         }
@@ -1742,6 +1745,19 @@ public abstract class EntityLiving extends Entity {
         }
     }
 
+    // Airplane start
+    private boolean cachedIsClimbing = false;
+    private BlockPosition lastClimbingPosition = null;
+
+    public boolean isClimbingCached() {
+        if (!this.getChunkCoordinates().equals(this.lastClimbingPosition)) {
+            this.cachedIsClimbing = this.isClimbing();
+            this.lastClimbingPosition = this.getChunkCoordinates();
+        }
+        return this.cachedIsClimbing;
+    }
+    // Airplane end
+
     public IBlockData ds() {
         return this.world.getType(this.getChunkCoordinates());
     }
@@ -3101,7 +3117,7 @@ public abstract class EntityLiving extends Entity {
         Vec3D vec3d = new Vec3D(this.locX(), this.getHeadY(), this.locZ());
         Vec3D vec3d1 = new Vec3D(entity.locX(), entity.getHeadY(), entity.locZ());
 
-        return this.world.rayTrace(new RayTrace(vec3d, vec3d1, RayTrace.BlockCollisionOption.COLLIDER, RayTrace.FluidCollisionOption.NONE, this)).getType() == MovingObjectPosition.EnumMovingObjectType.MISS;
+        return this.world.rayTraceDirect(vec3d, vec3d1, VoxelShapeCollision.a(this)) == MovingObjectPosition.EnumMovingObjectType.MISS; // Airplane - use direct method
     }
 
     @Override
diff --git a/src/main/java/net/minecraft/world/entity/EntityTypes.java b/src/main/java/net/minecraft/world/entity/EntityTypes.java
index 80c229c1852199fda85c03453d64cae33e413e89..7f70dda656ff9d802200f18139d2695e58c551c7 100644
--- a/src/main/java/net/minecraft/world/entity/EntityTypes.java
+++ b/src/main/java/net/minecraft/world/entity/EntityTypes.java
@@ -270,6 +270,8 @@ public class EntityTypes<T extends Entity> {
     private MinecraftKey bq;
     private final EntitySize br;
 
+    public java.util.function.Supplier<String> getEntityName = () -> IRegistry.ENTITY_TYPE.getKey(this).toString(); // Airplane - create lambda ones
+
     private static <T extends Entity> EntityTypes<T> a(String s, EntityTypes.Builder entitytypes_builder) { // CraftBukkit - decompile error
         return (EntityTypes) IRegistry.a((IRegistry) IRegistry.ENTITY_TYPE, s, (Object) entitytypes_builder.a(s));
     }
diff --git a/src/main/java/net/minecraft/world/entity/ai/behavior/BehaviorBetterJob.java b/src/main/java/net/minecraft/world/entity/ai/behavior/BehaviorBetterJob.java
index 72f1031e95b375823790f8cac4c102ba1205c9e8..e4821c1a7ceac582b019102230dbe5221add9050 100644
--- a/src/main/java/net/minecraft/world/entity/ai/behavior/BehaviorBetterJob.java
+++ b/src/main/java/net/minecraft/world/entity/ai/behavior/BehaviorBetterJob.java
@@ -3,6 +3,7 @@ package net.minecraft.world.entity.ai.behavior;
 import com.google.common.collect.ImmutableMap;
 import net.minecraft.core.GlobalPos;
 import net.minecraft.server.level.WorldServer;
+import net.minecraft.world.entity.EntityLiving;
 import net.minecraft.world.entity.ai.memory.MemoryModuleType;
 import net.minecraft.world.entity.ai.memory.MemoryStatus;
 import net.minecraft.world.entity.ai.village.poi.VillagePlaceType;
@@ -21,11 +22,31 @@ public class BehaviorBetterJob extends Behavior<EntityVillager> {
     protected void a(WorldServer worldserver, EntityVillager entityvillager, long i) {
         GlobalPos globalpos = (GlobalPos) entityvillager.getBehaviorController().getMemory(MemoryModuleType.JOB_SITE).get();
 
+        // Airplane start - remove stream
+        /*
         worldserver.y().c(globalpos.getBlockPosition()).ifPresent((villageplacetype) -> {
             BehaviorUtil.a(entityvillager, (entityvillager1) -> {
                 return this.a(globalpos, villageplacetype, entityvillager1);
             }).reduce(entityvillager, BehaviorBetterJob::a);
         });
+         */
+        java.util.Optional<VillagePlaceType> optVillagePlaceType = worldserver.y().c(globalpos.getBlockPosition());
+        if (optVillagePlaceType.isPresent()) {
+            VillagePlaceType villageplacetype = optVillagePlaceType.get();
+            java.util.Optional<java.util.List<EntityLiving>> optList = entityvillager.getBehaviorController().getMemory(MemoryModuleType.MOBS);
+            if (optList.isPresent()) {
+                EntityVillager previous = entityvillager;
+                for (EntityLiving entityliving : optList.get()) {
+                    if (entityliving instanceof EntityVillager && entityliving != entityvillager && entityliving.isAlive()) {
+                        EntityVillager entityvillager1 = (EntityVillager) entityliving;
+                        if (this.a(globalpos, villageplacetype, entityvillager1)) {
+                            previous = a(previous, entityvillager1);
+                        }
+                    }
+                }
+            }
+        }
+        // Airplane end
     }
 
     private static EntityVillager a(EntityVillager entityvillager, EntityVillager entityvillager1) {
diff --git a/src/main/java/net/minecraft/world/entity/ai/behavior/BehaviorFindPosition.java b/src/main/java/net/minecraft/world/entity/ai/behavior/BehaviorFindPosition.java
index bc8786e2aaeab4dbae4e9c7666ad816bc5bfac3f..09133c5822bc1386bc3d8a5f3c94196420bbfaea 100644
--- a/src/main/java/net/minecraft/world/entity/ai/behavior/BehaviorFindPosition.java
+++ b/src/main/java/net/minecraft/world/entity/ai/behavior/BehaviorFindPosition.java
@@ -67,6 +67,7 @@ public class BehaviorFindPosition extends Behavior<EntityCreature> {
 
     protected void a(WorldServer worldserver, EntityCreature entitycreature, long i) {
         this.f = i + 20L + (long) worldserver.getRandom().nextInt(20);
+        if (entitycreature.getNavigation().isStuck()) this.f += 200L; // Airplane - wait an additional 10s to check again if they're stuck
         VillagePlace villageplace = worldserver.y();
 
         this.g.long2ObjectEntrySet().removeIf((entry) -> {
diff --git a/src/main/java/net/minecraft/world/entity/ai/goal/PathfinderGoalSelector.java b/src/main/java/net/minecraft/world/entity/ai/goal/PathfinderGoalSelector.java
index 637928664f8c7b1c694a234e507c20724294e450..02e8288473138dcea008d6157318758e8d7ee3be 100644
--- a/src/main/java/net/minecraft/world/entity/ai/goal/PathfinderGoalSelector.java
+++ b/src/main/java/net/minecraft/world/entity/ai/goal/PathfinderGoalSelector.java
@@ -44,9 +44,14 @@ public class PathfinderGoalSelector {
     }
 
     // Paper start
-    public boolean inactiveTick() {
-        incRate();
-        return getCurRate() % getTickRate() == 0;
+    public boolean inactiveTick(int tickRate) { // Airplane - take tick rate
+        tickRate = Math.min(tickRate, getTickRate()); // Airplane
+        if (this.curRate++ % tickRate != 0) { // Airplane - use tick rate / increment curRate every tick
+            //incRate();
+            return false;
+        } else {
+            return true;
+        }
     }
     public boolean hasTasks() {
         for (PathfinderGoalWrapped task : getTasks()) {
diff --git a/src/main/java/net/minecraft/world/entity/ai/navigation/NavigationAbstract.java b/src/main/java/net/minecraft/world/entity/ai/navigation/NavigationAbstract.java
index 148bdbc2cffb002d8b6dd05e70854ab503804949..48e6a4c588ef39a4bde067d79b96a656c68750ce 100644
--- a/src/main/java/net/minecraft/world/entity/ai/navigation/NavigationAbstract.java
+++ b/src/main/java/net/minecraft/world/entity/ai/navigation/NavigationAbstract.java
@@ -433,6 +433,7 @@ public abstract class NavigationAbstract {
         }
     }
 
+    public boolean isStuck() { return this.t(); } // Airplane - OBFHELPER
     public boolean t() {
         return this.t;
     }
diff --git a/src/main/java/net/minecraft/world/entity/ai/targeting/PathfinderTargetCondition.java b/src/main/java/net/minecraft/world/entity/ai/targeting/PathfinderTargetCondition.java
index 88972dd8252bd2d2d8e384d616484ff682949fa8..5e8d3b84cbad299e09e8f25bfc712d11e1d1068e 100644
--- a/src/main/java/net/minecraft/world/entity/ai/targeting/PathfinderTargetCondition.java
+++ b/src/main/java/net/minecraft/world/entity/ai/targeting/PathfinderTargetCondition.java
@@ -84,9 +84,17 @@ public class PathfinderTargetCondition {
                 }
 
                 if (this.b > 0.0D) {
+                    // Airplane start - try to return early
+                    double range = (useFollowRange ? getFollowRange(entityliving) : this.b);
+                    double d2 = entityliving.h(entityliving1.locX(), entityliving1.locY(), entityliving1.locZ()); // move up here to use early
+
+                    if (d2 > range * range) { // if they're further than the absolute furthest allowed, they don't match
+                        return false;
+                    }
+
                     double d0 = this.g ? entityliving1.A(entityliving) : 1.0D;
-                    double d1 = Math.max((useFollowRange ? getFollowRange(entityliving) : this.b) * d0, 2.0D); // Paper
-                    double d2 = entityliving.h(entityliving1.locX(), entityliving1.locY(), entityliving1.locZ());
+                    double d1 = Math.max(range * d0, 2.0D); // Paper // Airplane - reuse range calculated above
+                    // Airplane end
 
                     if (d2 > d1 * d1) {
                         return false;
diff --git a/src/main/java/net/minecraft/world/entity/ambient/EntityBat.java b/src/main/java/net/minecraft/world/entity/ambient/EntityBat.java
index 61ebb278cf4ef57ae7a86c6c6ef1fa14559f21e2..341b95f73a839a548b202e7bf97fd18760c71fd8 100644
--- a/src/main/java/net/minecraft/world/entity/ambient/EntityBat.java
+++ b/src/main/java/net/minecraft/world/entity/ambient/EntityBat.java
@@ -10,6 +10,7 @@ import net.minecraft.nbt.NBTTagCompound;
 import net.minecraft.network.syncher.DataWatcher;
 import net.minecraft.network.syncher.DataWatcherObject;
 import net.minecraft.network.syncher.DataWatcherRegistry;
+import net.minecraft.server.MinecraftServer;
 import net.minecraft.sounds.SoundEffect;
 import net.minecraft.sounds.SoundEffects;
 import net.minecraft.util.MathHelper;
@@ -247,13 +248,22 @@ public class EntityBat extends EntityAmbient {
         }
     }
 
+    // Airplane start - only check for spooky season once an hour
+    private static boolean isSpookySeason = false;
+    private static final int ONE_HOUR = 20 * 60 * 60;
+    private static int lastSpookyCheck = -ONE_HOUR;
     private static boolean eJ() {
+        if (MinecraftServer.currentTick - lastSpookyCheck > ONE_HOUR) {
         LocalDate localdate = LocalDate.now();
         int i = localdate.get(ChronoField.DAY_OF_MONTH);
         int j = localdate.get(ChronoField.MONTH_OF_YEAR);
+            isSpookySeason = j == 10 && i >= 20 || j == 11 && i <= 3;
+            lastSpookyCheck = MinecraftServer.currentTick;
+        }
 
-        return j == 10 && i >= 20 || j == 11 && i <= 3;
+        return isSpookySeason;
     }
+    // Airplane end
 
     @Override
     protected float b(EntityPose entitypose, EntitySize entitysize) {
diff --git a/src/main/java/net/minecraft/world/entity/monster/EntityEnderman.java b/src/main/java/net/minecraft/world/entity/monster/EntityEnderman.java
index e993b1849beb60515c51ee4f37617faab63ca223..4d7b5d47ab6bd3b1408811c3b9c157b1eb5c30ae 100644
--- a/src/main/java/net/minecraft/world/entity/monster/EntityEnderman.java
+++ b/src/main/java/net/minecraft/world/entity/monster/EntityEnderman.java
@@ -57,6 +57,7 @@ import net.minecraft.world.level.World;
 import net.minecraft.world.level.block.Block;
 import net.minecraft.world.level.block.Blocks;
 import net.minecraft.world.level.block.state.IBlockData;
+import net.minecraft.world.level.chunk.Chunk;
 import net.minecraft.world.level.pathfinder.PathType;
 import net.minecraft.world.phys.AxisAlignedBB;
 import net.minecraft.world.phys.MovingObjectPositionBlock;
@@ -314,11 +315,18 @@ public class EntityEnderman extends EntityMonster implements IEntityAngerable {
     private boolean p(double d0, double d1, double d2) {
         BlockPosition.MutableBlockPosition blockposition_mutableblockposition = new BlockPosition.MutableBlockPosition(d0, d1, d2);
 
-        while (blockposition_mutableblockposition.getY() > 0 && !this.world.getType(blockposition_mutableblockposition).getMaterial().isSolid()) {
+        // Airplane start - single chunk lookup
+        Chunk chunk = this.world.getChunkIfLoaded(blockposition_mutableblockposition);
+        if (chunk == null) {
+            return false;
+        }
+
+        while (blockposition_mutableblockposition.getY() > 0 && !chunk.getType(blockposition_mutableblockposition).getMaterial().isSolid()) { // use chunk lookup
             blockposition_mutableblockposition.c(EnumDirection.DOWN);
         }
 
-        IBlockData iblockdata = this.world.getType(blockposition_mutableblockposition);
+        IBlockData iblockdata = chunk.getType(blockposition_mutableblockposition); // use chunk lookup
+        // Airplane end
         boolean flag = iblockdata.getMaterial().isSolid();
         boolean flag1 = iblockdata.getFluid().a((Tag) TagsFluid.WATER);
 
diff --git a/src/main/java/net/minecraft/world/entity/monster/hoglin/EntityHoglin.java b/src/main/java/net/minecraft/world/entity/monster/hoglin/EntityHoglin.java
index 375409f4b72edc7990da90460b30486fb2980fb6..9aa4850e021076fde306eea7eec104c31086c57f 100644
--- a/src/main/java/net/minecraft/world/entity/monster/hoglin/EntityHoglin.java
+++ b/src/main/java/net/minecraft/world/entity/monster/hoglin/EntityHoglin.java
@@ -54,7 +54,7 @@ public class EntityHoglin extends EntityAnimal implements IMonster, IOglin {
     public int conversionTicks = 0;
     public boolean cannotBeHunted = false;
     protected static final ImmutableList<? extends SensorType<? extends Sensor<? super EntityHoglin>>> bo = ImmutableList.of(SensorType.c, SensorType.d, SensorType.n, SensorType.m);
-    protected static final ImmutableList<? extends MemoryModuleType<?>> bp = ImmutableList.of(MemoryModuleType.BREED_TARGET, MemoryModuleType.MOBS, MemoryModuleType.VISIBLE_MOBS, MemoryModuleType.NEAREST_VISIBLE_PLAYER, MemoryModuleType.NEAREST_VISIBLE_TARGETABLE_PLAYER, MemoryModuleType.LOOK_TARGET, MemoryModuleType.WALK_TARGET, MemoryModuleType.CANT_REACH_WALK_TARGET_SINCE, MemoryModuleType.PATH, MemoryModuleType.ATTACK_TARGET, MemoryModuleType.ATTACK_COOLING_DOWN, MemoryModuleType.NEAREST_VISIBLE_ADULT_PIGLIN, new MemoryModuleType[]{MemoryModuleType.AVOID_TARGET, MemoryModuleType.VISIBLE_ADULT_PIGLIN_COUNT, MemoryModuleType.VISIBLE_ADULT_HOGLIN_COUNT, MemoryModuleType.NEAREST_VISIBLE_ADULT_HOGLINS, MemoryModuleType.NEAREST_VISIBLE_ADULY, MemoryModuleType.NEAREST_REPELLENT, MemoryModuleType.PACIFIED});
+    protected static final ImmutableList<MemoryModuleType<?>> bp = ImmutableList.of(MemoryModuleType.BREED_TARGET, MemoryModuleType.MOBS, MemoryModuleType.VISIBLE_MOBS, MemoryModuleType.NEAREST_VISIBLE_PLAYER, MemoryModuleType.NEAREST_VISIBLE_TARGETABLE_PLAYER, MemoryModuleType.LOOK_TARGET, MemoryModuleType.WALK_TARGET, MemoryModuleType.CANT_REACH_WALK_TARGET_SINCE, MemoryModuleType.PATH, MemoryModuleType.ATTACK_TARGET, MemoryModuleType.ATTACK_COOLING_DOWN, MemoryModuleType.NEAREST_VISIBLE_ADULT_PIGLIN, new MemoryModuleType[]{MemoryModuleType.AVOID_TARGET, MemoryModuleType.VISIBLE_ADULT_PIGLIN_COUNT, MemoryModuleType.VISIBLE_ADULT_HOGLIN_COUNT, MemoryModuleType.NEAREST_VISIBLE_ADULT_HOGLINS, MemoryModuleType.NEAREST_VISIBLE_ADULY, MemoryModuleType.NEAREST_REPELLENT, MemoryModuleType.PACIFIED}); // Airplane - decompile error
 
     public EntityHoglin(EntityTypes<? extends EntityHoglin> entitytypes, World world) {
         super(entitytypes, world);
@@ -118,15 +118,20 @@ public class EntityHoglin extends EntityAnimal implements IMonster, IOglin {
 
     @Override
     public BehaviorController<EntityHoglin> getBehaviorController() {
-        return super.getBehaviorController();
+        return (BehaviorController<EntityHoglin>) super.getBehaviorController(); // Airplane - decompile error
     }
 
+    private int behaviorTick; // Airplane
     @Override
     protected void mobTick() {
+        // Airplane - dynamic tick
+        if (!gg.airplane.AirplaneConfig.dynamicHoglinBehavior || this.behaviorTick++ % this.activatedPriority == 0) {
         this.world.getMethodProfiler().enter("hoglinBrain");
-        this.getBehaviorController().a((WorldServer) this.world, (EntityLiving) this);
+        this.getBehaviorController().a((WorldServer) this.world, (EntityHoglin) this); // Airplane - decompile error
         this.world.getMethodProfiler().exit();
         HoglinAI.a(this);
+        }
+        // Airplane end
         if (this.isConverting()) {
             ++this.conversionTicks;
             if (this.conversionTicks > 300) {
@@ -300,7 +305,7 @@ public class EntityHoglin extends EntityAnimal implements IMonster, IOglin {
 
     @Override
     protected SoundEffect getSoundAmbient() {
-        return this.world.isClientSide ? null : (SoundEffect) HoglinAI.b(this).orElse((Object) null);
+        return this.world.isClientSide ? null : (SoundEffect) HoglinAI.b(this).orElse(null); // Airplane - decompile error
     }
 
     @Override
diff --git a/src/main/java/net/minecraft/world/entity/monster/piglin/EntityPiglin.java b/src/main/java/net/minecraft/world/entity/monster/piglin/EntityPiglin.java
index f2f65dc0612cc232009ea7ff12f5c1ba4e6b15ea..48acef830eb1d919499e9b79dc6a9af4bdf8a17b 100644
--- a/src/main/java/net/minecraft/world/entity/monster/piglin/EntityPiglin.java
+++ b/src/main/java/net/minecraft/world/entity/monster/piglin/EntityPiglin.java
@@ -188,7 +188,7 @@ public class EntityPiglin extends EntityPiglinAbstract implements ICrossbow {
 
     @Override
     public BehaviorController<EntityPiglin> getBehaviorController() {
-        return super.getBehaviorController();
+        return (BehaviorController<EntityPiglin>) super.getBehaviorController(); // Airplane - compile error
     }
 
     @Override
@@ -244,12 +244,17 @@ public class EntityPiglin extends EntityPiglinAbstract implements ICrossbow {
         return !this.cannotHunt;
     }
 
+    private int behaviorTick; // Airplane
     @Override
     protected void mobTick() {
+        // Airplane - dynamic tick
+        if (!gg.airplane.AirplaneConfig.dynamicPiglinBehavior || this.behaviorTick++ % this.activatedPriority == 0) {
         this.world.getMethodProfiler().enter("piglinBrain");
-        this.getBehaviorController().a((WorldServer) this.world, (EntityLiving) this);
+        this.getBehaviorController().a((WorldServer) this.world, (EntityPiglin) this); // Airplane - compile error
         this.world.getMethodProfiler().exit();
         PiglinAI.b(this);
+        }
+        // Airplane end
         super.mobTick();
     }
 
@@ -386,7 +391,7 @@ public class EntityPiglin extends EntityPiglinAbstract implements ICrossbow {
 
     @Override
     protected SoundEffect getSoundAmbient() {
-        return this.world.isClientSide ? null : (SoundEffect) PiglinAI.d(this).orElse((Object) null);
+        return this.world.isClientSide ? null : (SoundEffect) PiglinAI.d(this).orElse(null); // Airplane - compile error
     }
 
     @Override
diff --git a/src/main/java/net/minecraft/world/entity/npc/EntityVillager.java b/src/main/java/net/minecraft/world/entity/npc/EntityVillager.java
index 2d0b83923d58cc7b6918b4e2ff2bece13ca26899..d8028675fc82883d716bcfb44431ca6ac7dfda36 100644
--- a/src/main/java/net/minecraft/world/entity/npc/EntityVillager.java
+++ b/src/main/java/net/minecraft/world/entity/npc/EntityVillager.java
@@ -231,11 +231,17 @@ public class EntityVillager extends EntityVillagerAbstract implements Reputation
     }
     // Spigot End
 
+    private int behaviorTick = 0;
+
     @Override
     protected void mobTick() { mobTick(false); }
     protected void mobTick(boolean inactive) {
         this.world.getMethodProfiler().enter("villagerBrain");
-        if (!inactive) this.getBehaviorController().a((WorldServer) this.world, this); // CraftBukkit - decompile error // Paper
+        if (!inactive) {
+            if (!gg.airplane.AirplaneConfig.dynamicVillagerBehavior || behaviorTick++ % this.activatedPriority == 0) {
+                this.getBehaviorController().a((WorldServer) this.world, this); // CraftBukkit - decompile error // Paper
+            }
+        }
         this.world.getMethodProfiler().exit();
         if (this.bF) {
             this.bF = false;
diff --git a/src/main/java/net/minecraft/world/entity/player/EntityHuman.java b/src/main/java/net/minecraft/world/entity/player/EntityHuman.java
index 5bce47fa8f191bc1d33c04c9865cb0efd492a9a2..5f9e64df007ebc40f7bcb50be495b10e51d5b87a 100644
--- a/src/main/java/net/minecraft/world/entity/player/EntityHuman.java
+++ b/src/main/java/net/minecraft/world/entity/player/EntityHuman.java
@@ -162,7 +162,8 @@ public abstract class EntityHuman extends EntityLiving {
     protected int bG;
     protected final float bH = 0.02F;
     private int g;
-    private GameProfile bJ; public final void setProfile(final GameProfile profile) { this.bJ = profile; } // Paper - OBFHELPER
+    private IChatBaseComponent displayName; // Airplane - cache displayName
+    private GameProfile bJ; public final void setProfile(final GameProfile profile) { this.bJ = profile; this.displayName = null; } // Paper - OBFHELPER // Airplane - use to reset displayName
     private ItemStack bL;
     private final ItemCooldown bM;
     @Nullable
@@ -1840,7 +1841,12 @@ public abstract class EntityHuman extends EntityLiving {
 
     @Override
     public IChatBaseComponent getDisplayName() {
-        return new ChatComponentText(this.bJ.getName());
+        // Airplane start - cache display name
+        if (this.displayName == null) {
+            this.displayName = new ChatComponentText(this.getProfile().getName());
+        }
+        return this.displayName;
+        // Airplane end
     }
 
     public InventoryEnderChest getEnderChest() {
diff --git a/src/main/java/net/minecraft/world/entity/player/PlayerInventory.java b/src/main/java/net/minecraft/world/entity/player/PlayerInventory.java
index 2df3ae0b72ccb5f816d55fed15396ba5a1affb7f..754a3ea18905b79ae5ae4fc2442c94f0611b6d0e 100644
--- a/src/main/java/net/minecraft/world/entity/player/PlayerInventory.java
+++ b/src/main/java/net/minecraft/world/entity/player/PlayerInventory.java
@@ -630,6 +630,8 @@ public class PlayerInventory implements IInventory, INamableTileEntity {
     }
 
     public boolean h(ItemStack itemstack) {
+        // Airplane start - skip using abstract iterators and stuff, they're generic and slow and allocating them sucks
+        /*
         Iterator iterator = this.f.iterator();
 
         while (iterator.hasNext()) {
@@ -644,6 +646,20 @@ public class PlayerInventory implements IInventory, INamableTileEntity {
                 }
             }
         }
+         */
+        List<NonNullList<ItemStack>> components = this.getComponents();
+        for (int i = 0; i < components.size(); i++) {
+            List<ItemStack> list = components.get(i);
+
+            for (int j = 0; j < list.size(); j++) {
+                ItemStack itemstack1 = list.get(j);
+
+                if (!itemstack1.isEmpty() && itemstack1.doMaterialsMatch(itemstack)) {
+                    return true;
+                }
+            }
+        }
+        // Airplane end
 
         return false;
     }
diff --git a/src/main/java/net/minecraft/world/entity/projectile/EntityProjectile.java b/src/main/java/net/minecraft/world/entity/projectile/EntityProjectile.java
index e55061b6c04b4bde92404a6ef58ba9a52cd99c1d..24d205dd1f31ece82d5cf516b8642eb0172e1a97 100644
--- a/src/main/java/net/minecraft/world/entity/projectile/EntityProjectile.java
+++ b/src/main/java/net/minecraft/world/entity/projectile/EntityProjectile.java
@@ -4,6 +4,8 @@ import net.minecraft.core.BlockPosition;
 import net.minecraft.core.particles.Particles;
 import net.minecraft.network.protocol.Packet;
 import net.minecraft.network.protocol.game.PacketPlayOutSpawnEntity;
+import net.minecraft.server.MinecraftServer;
+import net.minecraft.util.MathHelper;
 import net.minecraft.world.entity.Entity;
 import net.minecraft.world.entity.EntityLiving;
 import net.minecraft.world.entity.EntityTypes;
@@ -102,6 +104,37 @@ public abstract class EntityProjectile extends IProjectile {
         this.setPosition(d0, d1, d2);
     }
 
+    private static int loadedThisTick = 0;
+    private static int loadedTick;
+
+    private int buffered = 0;
+
+    // Airplane start
+    @Override
+    public void setPosition(double d0, double d1, double d2) {
+        if (loadedTick != MinecraftServer.currentTick) {
+            loadedTick = MinecraftServer.currentTick;
+            loadedThisTick = 0;
+        }
+        int previousX = MathHelper.floor(this.locX()) >> 4, previousZ = MathHelper.floor(this.locZ()) >> 4;
+        int newX = MathHelper.floor(d0) >> 4, newZ = MathHelper.floor(d2) >> 4;
+        if (previousX != newX || previousZ != newZ) {
+            boolean isLoaded = this.world.isChunkLoaded(newX, newZ);
+            if (!isLoaded) {
+                if (loadedThisTick > 10) { // Airplane 10 = max chunks to load from projectiles in a tick todo config
+                    if (++buffered > 20) { // Airplane 20 = max chunks  a single projectile loads overall todo config
+                        this.die();
+                    }
+                    return;
+                }
+                loadedThisTick++;
+            }
+            buffered = 0;
+        }
+        super.setPosition(d0, d1, d2);
+    }
+    // Airplane end
+
     protected float k() {
         return 0.03F;
     }
diff --git a/src/main/java/net/minecraft/world/item/crafting/ShapelessRecipes.java b/src/main/java/net/minecraft/world/item/crafting/ShapelessRecipes.java
index e112d149fc3a7af7f0c9a5280c94c9b03b2aba2d..d2afc367fb393c6206f9cd599d4603294d457608 100644
--- a/src/main/java/net/minecraft/world/item/crafting/ShapelessRecipes.java
+++ b/src/main/java/net/minecraft/world/item/crafting/ShapelessRecipes.java
@@ -26,8 +26,16 @@ public class ShapelessRecipes implements RecipeCrafting {
     private final String group;
     private final ItemStack result;
     private final NonNullList<RecipeItemStack> ingredients;
+    private final boolean isBukkit; // Airplane
 
+    // Airplane start - add isBukkit constructor param
     public ShapelessRecipes(MinecraftKey minecraftkey, String s, ItemStack itemstack, NonNullList<RecipeItemStack> nonnulllist) {
+        this(minecraftkey, s, itemstack, nonnulllist, false);
+    }
+
+    public ShapelessRecipes(MinecraftKey minecraftkey, String s, ItemStack itemstack, NonNullList<RecipeItemStack> nonnulllist, boolean isBukkit) {
+        this.isBukkit = isBukkit;
+        // Airplane end
         this.key = minecraftkey;
         this.group = s;
         this.result = itemstack;
@@ -69,6 +77,28 @@ public class ShapelessRecipes implements RecipeCrafting {
     }
 
     public boolean a(InventoryCrafting inventorycrafting, World world) {
+        // Airplane start
+        if (!this.isBukkit) {
+            java.util.List<RecipeItemStack> ingredients = com.google.common.collect.Lists.newArrayList(this.ingredients.toArray(new RecipeItemStack[0]));
+
+            inventory: for (int index = 0; index < inventorycrafting.getSize(); index++) {
+                ItemStack itemStack = inventorycrafting.getItem(index);
+
+                if (!itemStack.isEmpty()) {
+                    for (int i = 0; i < ingredients.size(); i++) {
+                        if (ingredients.get(i).test(itemStack)) {
+                            ingredients.remove(i);
+                            continue inventory;
+                        }
+                    }
+                    return false;
+                }
+            }
+
+            return ingredients.isEmpty();
+        }
+        // Airplane end
+
         AutoRecipeStackManager autorecipestackmanager = new AutoRecipeStackManager();
         int i = 0;
 
diff --git a/src/main/java/net/minecraft/world/level/IBlockAccess.java b/src/main/java/net/minecraft/world/level/IBlockAccess.java
index e612e1d30f76e217b1aa23488ab025adce048f57..c9198d242b9053fad6fa5b53c1894679002d50a7 100644
--- a/src/main/java/net/minecraft/world/level/IBlockAccess.java
+++ b/src/main/java/net/minecraft/world/level/IBlockAccess.java
@@ -14,9 +14,11 @@ import net.minecraft.world.level.block.state.IBlockData;
 import net.minecraft.world.level.material.Fluid;
 import net.minecraft.world.level.material.Material;
 import net.minecraft.world.phys.AxisAlignedBB;
+import net.minecraft.world.phys.MovingObjectPosition;
 import net.minecraft.world.phys.MovingObjectPositionBlock;
 import net.minecraft.world.phys.Vec3D;
 import net.minecraft.world.phys.shapes.VoxelShape;
+import net.minecraft.world.phys.shapes.VoxelShapeCollision;
 
 public interface IBlockAccess {
 
@@ -56,6 +58,15 @@ public interface IBlockAccess {
         return BlockPosition.a(axisalignedbb).map(this::getType);
     }
 
+    // Airplane start - broken down variant of below rayTraceBlock, used by World#rayTraceDirect
+    default MovingObjectPosition.EnumMovingObjectType rayTraceBlockDirect(Vec3D vec3d, Vec3D vec3d1, BlockPosition blockposition, IBlockData iblockdata, VoxelShapeCollision voxelshapecoll) {
+        VoxelShape voxelshape = RayTrace.BlockCollisionOption.COLLIDER.get(iblockdata, this, blockposition, voxelshapecoll);
+        MovingObjectPositionBlock movingobjectpositionblock = this.rayTrace(vec3d, vec3d1, blockposition, voxelshape, iblockdata);
+
+        return movingobjectpositionblock == null ? null : movingobjectpositionblock.getType();
+    }
+    // Airplane end
+
     // CraftBukkit start - moved block handling into separate method for use by Block#rayTrace
     default MovingObjectPositionBlock rayTraceBlock(RayTrace raytrace1, BlockPosition blockposition) {
             // Paper start - Prevent raytrace from loading chunks
diff --git a/src/main/java/net/minecraft/world/level/SpawnerCreature.java b/src/main/java/net/minecraft/world/level/SpawnerCreature.java
index d497006f05f79015cd791849888832bb53f4a414..d98526785ff2fa3b72e8ffffcb89a57a2203a5c8 100644
--- a/src/main/java/net/minecraft/world/level/SpawnerCreature.java
+++ b/src/main/java/net/minecraft/world/level/SpawnerCreature.java
@@ -415,7 +415,10 @@ public final class SpawnerCreature {
     }
 
     private static List<BiomeSettingsMobs.c> a(WorldServer worldserver, StructureManager structuremanager, ChunkGenerator chunkgenerator, EnumCreatureType enumcreaturetype, BlockPosition blockposition, @Nullable BiomeBase biomebase) {
-        return enumcreaturetype == EnumCreatureType.MONSTER && worldserver.getType(blockposition.down()).getBlock() == Blocks.NETHER_BRICKS && structuremanager.a(blockposition, false, StructureGenerator.FORTRESS).e() ? StructureGenerator.FORTRESS.c() : chunkgenerator.getMobsFor(biomebase != null ? biomebase : worldserver.getBiome(blockposition), structuremanager, enumcreaturetype, blockposition);
+        // Airplane start - single chunk lookup
+        Chunk chunk;
+        return enumcreaturetype == EnumCreatureType.MONSTER && (chunk = worldserver.getChunkIfLoaded(blockposition)) != null && chunk.getType(blockposition.down()).getBlock() == Blocks.NETHER_BRICKS && structuremanager.a(blockposition, false, StructureGenerator.FORTRESS).e() ? StructureGenerator.FORTRESS.c() : chunkgenerator.getMobsFor(biomebase != null ? biomebase : worldserver.getBiome(blockposition), structuremanager, enumcreaturetype, blockposition);
+        // Airplane end
     }
 
     private static BlockPosition getRandomPosition(World world, Chunk chunk) {
diff --git a/src/main/java/net/minecraft/world/level/StructureManager.java b/src/main/java/net/minecraft/world/level/StructureManager.java
index 43418273f00f3703c7bd86586847d469af92c18f..d11e79093f9a5121c98b7da840bc79d204895b65 100644
--- a/src/main/java/net/minecraft/world/level/StructureManager.java
+++ b/src/main/java/net/minecraft/world/level/StructureManager.java
@@ -16,6 +16,11 @@ import net.minecraft.world.level.levelgen.feature.StructureGenerator;
 import net.minecraft.world.level.levelgen.structure.StructurePiece;
 import net.minecraft.world.level.levelgen.structure.StructureStart;
 
+// Airplane start
+import it.unimi.dsi.fastutil.longs.LongIterator;
+import it.unimi.dsi.fastutil.longs.LongSet;
+// Airplane end
+
 public class StructureManager {
 
     private final GeneratorAccess a; public GeneratorAccess getLevel() { return a; } // Paper - OBFHELPER
@@ -52,13 +57,15 @@ public class StructureManager {
     public java.util.List<StructureStart<?>> getFeatureStarts(SectionPosition sectionPosition, StructureGenerator<?> structureGenerator, IWorldReader world) {
         // Tuinity end - add world parameter
         java.util.List<StructureStart<?>> list = new ObjectArrayList<>();
-        for (Long curLong: (world == null ? getLevel() : world).getChunkAt(sectionPosition.a(), sectionPosition.c(), ChunkStatus.STRUCTURE_REFERENCES).b(structureGenerator)) { // Tuinity - fix deadlock on world gen - chunk can be unloaded while generating, so we should be using the generator's regionlimitedaccess so we always get the chunk
-            SectionPosition sectionPosition1 = SectionPosition.a(new ChunkCoordIntPair(curLong), 0);
+        // Airplane start - skip allocating Longs
+        (world == null ? getLevel() : world).getChunkAt(sectionPosition.a(), sectionPosition.c(), ChunkStatus.STRUCTURE_REFERENCES).b(structureGenerator).forEach((java.util.function.LongConsumer) curLong -> {
+            SectionPosition sectionPosition1 = SectionPosition.a(ChunkCoordIntPair.getX(curLong), 0, ChunkCoordIntPair.getZ(curLong)); // don't allocate ChunkCoordIntPair
             StructureStart<?> structurestart = a(sectionPosition1, structureGenerator, getLevel().getChunkAt(sectionPosition1.a(), sectionPosition1.c(), ChunkStatus.STRUCTURE_STARTS));
             if (structurestart != null && structurestart.e()) {
                 list.add(structurestart);
             }
-        }
+        });
+        // Airplane end
         return list;
     }
     // Paper end
@@ -86,7 +93,18 @@ public class StructureManager {
     }
     public StructureStart<?> getStructureStarts(BlockPosition blockposition, boolean flag, StructureGenerator<?> structuregenerator, IWorldReader world) {
         // Paper start - remove structure streams
-        for (StructureStart<?> structurestart : getFeatureStarts(SectionPosition.a(blockposition), structuregenerator, world)) { // Tuinity end - add world parameter
+        // Airplane start - inline getFeatureStarts to skip creating the list
+        SectionPosition sectionPosition = SectionPosition.a(blockposition);
+
+        // use iterator here instead of forEach like in getFeatureStarts so we can return early
+        LongSet longSet = (world == null ? getLevel() : world).getChunkAt(sectionPosition.a(), sectionPosition.c(), ChunkStatus.STRUCTURE_REFERENCES).b(structuregenerator);
+        LongIterator iterator = longSet.iterator();
+        while (iterator.hasNext()) {
+            long curLong = iterator.nextLong();
+            SectionPosition sectionPosition1 = SectionPosition.a(ChunkCoordIntPair.getX(curLong), 0, ChunkCoordIntPair.getZ(curLong)); // don't allocate ChunkCoordIntPair
+            StructureStart<?> structurestart = a(sectionPosition1, structuregenerator, getLevel().getChunkAt(sectionPosition1.a(), sectionPosition1.c(), ChunkStatus.STRUCTURE_STARTS));
+            if (structurestart != null && structurestart.e()) {
+
             if (structurestart.c().b(blockposition)) {
                 if (!flag) {
                     return structurestart;
@@ -97,7 +115,10 @@ public class StructureManager {
                     }
                 }
             }
+
+            }
         }
+        // Airplane end
         return StructureStart.a;
         // Paper end
     }
diff --git a/src/main/java/net/minecraft/world/level/World.java b/src/main/java/net/minecraft/world/level/World.java
index af01f5d635eada7175b9d7fdb47a65530686a539..51e6cd6119465f9fd6385072997971449afb5f42 100644
--- a/src/main/java/net/minecraft/world/level/World.java
+++ b/src/main/java/net/minecraft/world/level/World.java
@@ -69,6 +69,8 @@ import net.minecraft.world.level.saveddata.maps.WorldMap;
 import net.minecraft.world.level.storage.WorldData;
 import net.minecraft.world.level.storage.WorldDataMutable;
 import net.minecraft.world.phys.AxisAlignedBB;
+import net.minecraft.world.phys.MovingObjectPosition;
+import net.minecraft.world.phys.Vec3D;
 import net.minecraft.world.phys.shapes.OperatorBoolean;
 import net.minecraft.world.phys.shapes.VoxelShape;
 import net.minecraft.world.phys.shapes.VoxelShapeCollision;
@@ -104,7 +106,7 @@ public abstract class World implements GeneratorAccess, AutoCloseable {
     //public final List<TileEntity> tileEntityList = Lists.newArrayList(); // Paper - remove unused list
     public final List<TileEntity> tileEntityListTick = Lists.newArrayList();
     protected final List<TileEntity> tileEntityListPending = Lists.newArrayList();
-    protected final java.util.Set<TileEntity> tileEntityListUnload = com.google.common.collect.Sets.newHashSet();
+    protected final java.util.Set<TileEntity> tileEntityListUnload = java.util.Collections.newSetFromMap(new java.util.IdentityHashMap<>()); // Airplane - use set with faster contains
     public final Thread serverThread;
     private final boolean debugWorld;
     private int d;
@@ -378,6 +380,91 @@ public abstract class World implements GeneratorAccess, AutoCloseable {
         return null;
     }
 
+    // Airplane start - broken down method of raytracing for EntityLiving#hasLineOfSight, replaces IBlockAccess#rayTrace(RayTrace)
+    public MovingObjectPosition.EnumMovingObjectType rayTraceDirect(Vec3D vec3d, Vec3D vec3d1, VoxelShapeCollision voxelshapecoll) {
+        // most of this code comes from IBlockAccess#a(RayTrace, BiFunction, Function), but removes the needless functions
+        if (vec3d.equals(vec3d1)) {
+            return MovingObjectPosition.EnumMovingObjectType.MISS;
+        }
+
+        double endX = MathHelper.linearInterpolation(-1.0E-7D, vec3d1.x, vec3d.x);
+        double endY = MathHelper.linearInterpolation(-1.0E-7D, vec3d1.y, vec3d.y);
+        double endZ = MathHelper.linearInterpolation(-1.0E-7D, vec3d1.z, vec3d.z);
+
+        double startX = MathHelper.linearInterpolation(-1.0E-7D, vec3d.x, vec3d1.x);
+        double startY = MathHelper.linearInterpolation(-1.0E-7D, vec3d.y, vec3d1.y);
+        double startZ = MathHelper.linearInterpolation(-1.0E-7D, vec3d.z, vec3d1.z);
+
+        int currentX = MathHelper.floor(startX);
+        int currentY = MathHelper.floor(startY);
+        int currentZ = MathHelper.floor(startZ);
+
+        BlockPosition.MutableBlockPosition currentBlock = new BlockPosition.MutableBlockPosition(currentX, currentY, currentZ);
+
+        Chunk chunk = this.getChunkIfLoaded(currentBlock);
+        if (chunk == null) {
+            return MovingObjectPosition.EnumMovingObjectType.MISS;
+        }
+
+        MovingObjectPosition.EnumMovingObjectType initialCheck = this.rayTraceBlockDirect(vec3d, vec3d1, currentBlock, chunk.getType(currentBlock), voxelshapecoll);
+
+        if (initialCheck != null) {
+            return initialCheck;
+        }
+
+        double diffX = endX - startX;
+        double diffY = endY - startY;
+        double diffZ = endZ - startZ;
+
+        int xDirection = MathHelper.sign(diffX);
+        int yDirection = MathHelper.sign(diffY);
+        int zDirection = MathHelper.sign(diffZ);
+
+        double normalizedX = xDirection == 0 ? Double.MAX_VALUE : (double) xDirection / diffX;
+        double normalizedY = yDirection == 0 ? Double.MAX_VALUE : (double) yDirection / diffY;
+        double normalizedZ = zDirection == 0 ? Double.MAX_VALUE : (double) zDirection / diffZ;
+
+        double normalizedXDirection = normalizedX * (xDirection > 0 ? 1.0D - MathHelper.getDecimals(startX) : MathHelper.getDecimals(startX));
+        double normalizedYDirection = normalizedY * (yDirection > 0 ? 1.0D - MathHelper.getDecimals(startY) : MathHelper.getDecimals(startY));
+        double normalizedZDirection = normalizedZ * (zDirection > 0 ? 1.0D - MathHelper.getDecimals(startZ) : MathHelper.getDecimals(startZ));
+
+        MovingObjectPosition.EnumMovingObjectType result;
+
+        do {
+            if (normalizedXDirection > 1.0D && normalizedYDirection > 1.0D && normalizedZDirection > 1.0D) {
+                return MovingObjectPosition.EnumMovingObjectType.MISS;
+            }
+
+            if (normalizedXDirection < normalizedYDirection) {
+                if (normalizedXDirection < normalizedZDirection) {
+                    currentX += xDirection;
+                    normalizedXDirection += normalizedX;
+                } else {
+                    currentZ += zDirection;
+                    normalizedZDirection += normalizedZ;
+                }
+            } else if (normalizedYDirection < normalizedZDirection) {
+                currentY += yDirection;
+                normalizedYDirection += normalizedY;
+            } else {
+                currentZ += zDirection;
+                normalizedZDirection += normalizedZ;
+            }
+
+            currentBlock.setValues(currentX, currentY, currentZ);
+            if (chunk.getPos().x != currentBlock.getX() >> 4 || chunk.getPos().z != currentBlock.getZ() >> 4) {
+                chunk = this.getChunkIfLoaded(currentBlock);
+                if (chunk == null) {
+                    return MovingObjectPosition.EnumMovingObjectType.MISS;
+                }
+            }
+            result = this.rayTraceBlockDirect(vec3d, vec3d1, currentBlock, chunk.getType(currentBlock), voxelshapecoll);
+        } while (result == null);
+
+        return result;
+    }
+    // Airplane end
+
     public static boolean isValidLocation(BlockPosition blockposition) {
         return blockposition.isValidLocation(); // Paper - use better/optimized check
     }
@@ -899,12 +986,17 @@ public abstract class World implements GeneratorAccess, AutoCloseable {
         gameprofilerfiller.enter("blockEntities");
         timings.tileEntityTick.startTiming(); // Spigot
         if (!this.tileEntityListUnload.isEmpty()) {
+            // Airplane start - we just use the identitymap as the basis for the unload set now instead of copying
+            /*
             // Paper start - Use alternate implementation with faster contains
             java.util.Set<TileEntity> toRemove = java.util.Collections.newSetFromMap(new java.util.IdentityHashMap<>());
             toRemove.addAll(tileEntityListUnload);
             this.tileEntityListTick.removeAll(toRemove);
             // Paper end
             //this.tileEntityList.removeAll(this.tileEntityListUnload); // Paper - remove unused list
+             */
+            this.tileEntityListTick.removeAll(this.tileEntityListUnload);
+            // Airplane end
             this.tileEntityListUnload.clear();
         }
 
@@ -1016,19 +1108,19 @@ public abstract class World implements GeneratorAccess, AutoCloseable {
 
     public void a(Consumer<Entity> consumer, Entity entity) {
         try {
-            consumer.accept(entity);
+            consumer.accept(entity); // Airplane - error on change
         } catch (Throwable throwable) {
             if (throwable instanceof ThreadDeath) throw throwable; // Paper
             // Paper start - Prevent tile entity and entity crashes
             String msg = "Entity threw exception at " + entity.world.getWorld().getName() + ":" + entity.locX() + "," + entity.locY() + "," + entity.locZ();
             System.err.println(msg);
             throwable.printStackTrace();
-            getServer().getPluginManager().callEvent(new ServerExceptionEvent(new ServerInternalException(msg, throwable)));
+            getServer().getPluginManager().callEvent(new ServerExceptionEvent(new ServerInternalException(msg, throwable))); // Airplane - error on change
             entity.dead = true;
             return;
             // Paper end
         }
-        MinecraftServer.getServer().executeMidTickTasks(); // Tuinity - execute chunk tasks mid tick
+        MinecraftServer.getServer().executeMidTickTasks(); // Tuinity - execute chunk tasks mid tick // Airplane - error on change
     }
     // Paper start - Prevent armor stands from doing entity lookups
     @Override
diff --git a/src/main/java/net/minecraft/world/level/block/Block.java b/src/main/java/net/minecraft/world/level/block/Block.java
index 596b4597313b87296d39027b13555b5ad1cba9e6..f8a982add50862f1bc977f3039e7e9aeed9138ae 100644
--- a/src/main/java/net/minecraft/world/level/block/Block.java
+++ b/src/main/java/net/minecraft/world/level/block/Block.java
@@ -392,6 +392,7 @@ public class Block extends BlockBase implements IMaterial {
         return this.d;
     }
 
+    /** currently seems to only return true for MOVING_PISTON and SCAFFOLDING */ public boolean isComplexHitbox() { return this.o(); } // Airplane - OBFHELPER
     public boolean o() {
         return this.aA;
     }
diff --git a/src/main/java/net/minecraft/world/level/block/BlockDirtSnowSpreadable.java b/src/main/java/net/minecraft/world/level/block/BlockDirtSnowSpreadable.java
index 712596420af83e6e1b9d147ae2fd8d8a1f36e1b9..9c29fa3efac7e16df81b8a44934e3286bb37f1f6 100644
--- a/src/main/java/net/minecraft/world/level/block/BlockDirtSnowSpreadable.java
+++ b/src/main/java/net/minecraft/world/level/block/BlockDirtSnowSpreadable.java
@@ -54,8 +54,14 @@ public abstract class BlockDirtSnowSpreadable extends BlockDirtSnow {
             if (worldserver.getLightLevel(blockposition.up()) >= 9) {
                 IBlockData iblockdata1 = this.getBlockData();
 
+                // Airplane start - use mutable position
+                BlockPosition.MutableBlockPosition blockposition1 = new BlockPosition.MutableBlockPosition();
                 for (int i = 0; i < 4; ++i) {
+                    blockposition1.setValues(blockposition).addValues(random.nextInt(3) - 1, random.nextInt(5) - 3, random.nextInt(3) - 1);
+                    /*
                     BlockPosition blockposition1 = blockposition.b(random.nextInt(3) - 1, random.nextInt(5) - 3, random.nextInt(3) - 1);
+                     */
+                    // Airplane end
 
                     if (worldserver.getType(blockposition1).a(Blocks.DIRT) && c(iblockdata1, (IWorldReader) worldserver, blockposition1)) {
                         org.bukkit.craftbukkit.event.CraftEventFactory.handleBlockSpreadEvent(worldserver, blockposition, blockposition1, (IBlockData) iblockdata1.set(BlockDirtSnowSpreadable.a, worldserver.getType(blockposition1.up()).a(Blocks.SNOW))); // CraftBukkit
diff --git a/src/main/java/net/minecraft/world/level/block/BlockFire.java b/src/main/java/net/minecraft/world/level/block/BlockFire.java
index 70c32b7a53a1107cced3491ebac19b0eaf4fec2e..3f3e241f3b24d9df9d57760c5515ff021718065a 100644
--- a/src/main/java/net/minecraft/world/level/block/BlockFire.java
+++ b/src/main/java/net/minecraft/world/level/block/BlockFire.java
@@ -340,13 +340,15 @@ public class BlockFire extends BlockFireAbstract {
             return 0;
         } else {
             int i = 0;
-            EnumDirection[] aenumdirection = EnumDirection.values();
+            EnumDirection[] aenumdirection = EnumDirection.getValues(); // Airplane - don't allocate new array here
             int j = aenumdirection.length;
 
+            BlockPosition.MutableBlockPosition copy = new BlockPosition.MutableBlockPosition(); // Airplane - single allocation for this method
             for (int k = 0; k < j; ++k) {
+                copy.setValues(blockposition); // Airplane - reset values
                 EnumDirection enumdirection = aenumdirection[k];
                 // Paper start
-                IBlockData iblockdata = iworldreader.getTypeIfLoaded(blockposition.shift(enumdirection));
+                IBlockData iblockdata = iworldreader.getTypeIfLoaded(copy.mutableShift(enumdirection, 1)); // Airplane - mutable shift
                 if (iblockdata == null) {
                     continue;
                 }
diff --git a/src/main/java/net/minecraft/world/level/chunk/Chunk.java b/src/main/java/net/minecraft/world/level/chunk/Chunk.java
index fc07e2014e961da5d97095c4ee6f972e2ece3ec3..8f5809756b4fb358f1207c1d61c5cbe6df3fff00 100644
--- a/src/main/java/net/minecraft/world/level/chunk/Chunk.java
+++ b/src/main/java/net/minecraft/world/level/chunk/Chunk.java
@@ -99,6 +99,18 @@ public class Chunk implements IChunkAccess {
     private final ChunkCoordIntPair loc; public final long coordinateKey; public final int locX; public final int locZ; // Paper - cache coordinate key
     private volatile boolean x;
 
+    // Airplane start - instead of using a random every time the chunk is ticked, define when lightning strikes preemptively
+    private int lightningTick;
+    // shouldDoLightning compiles down to 29 bytes, which with the default of 35 byte inlining should guarantee an inline
+    public final boolean shouldDoLightning(java.util.Random random) {
+        if (this.lightningTick-- <= 0) {
+            this.lightningTick = random.nextInt(100000) << 1;
+            return true;
+        }
+        return false;
+    }
+    // Airplane end
+
     public Chunk(World world, ChunkCoordIntPair chunkcoordintpair, BiomeStorage biomestorage) {
         this(world, chunkcoordintpair, biomestorage, ChunkConverter.a, TickListEmpty.b(), TickListEmpty.b(), 0L, (ChunkSection[]) null, (Consumer) null);
     }
@@ -333,6 +345,7 @@ public class Chunk implements IChunkAccess {
         // CraftBukkit start
         this.bukkitChunk = new org.bukkit.craftbukkit.CraftChunk(this);
         this.entitySlicesManager = new com.tuinity.tuinity.world.ChunkEntitySlices(this.world, this.loc.x, this.loc.z, 0, 15); // TODO update for 1.17 // Tuinity
+        this.lightningTick = this.world.random.nextInt(100000) << 1; // Airplane - initialize lightning tick
     }
 
     public org.bukkit.Chunk bukkitChunk;
diff --git a/src/main/java/net/minecraft/world/level/chunk/DataPaletteBlock.java b/src/main/java/net/minecraft/world/level/chunk/DataPaletteBlock.java
index a6937366cd9c9d708edb5cd1ab3ac096e7b2032e..a579c5bf9e20c74aa3bf8ef6bc00576409805ca6 100644
--- a/src/main/java/net/minecraft/world/level/chunk/DataPaletteBlock.java
+++ b/src/main/java/net/minecraft/world/level/chunk/DataPaletteBlock.java
@@ -235,12 +235,16 @@ public class DataPaletteBlock<T> implements DataPaletteExpandable<T> {
         this.b();
     }
 
+    // Airplane start - add parameter for reusing aint
     public synchronized void a(NBTTagCompound nbttagcompound, String s, String s1) { // Paper - synchronize
+        a(nbttagcompound, s, s1, new int[4096]);
+    }
+    public synchronized void a(NBTTagCompound nbttagcompound, String s, String s1, int[] aint) { // Paper - synchronize // Airplane end
         this.a();
         DataPaletteHash<T> datapalettehash = new DataPaletteHash<>(this.d, this.i, this.c, this.e, this.f);
         T t0 = this.g;
         int i = datapalettehash.a(this.g);
-        int[] aint = new int[4096];
+        //int[] aint = new int[4096]; // Airplane - use parameter
 
         for (int j = 0; j < 4096; ++j) {
             T t1 = this.a(j);
diff --git a/src/main/java/net/minecraft/world/level/chunk/storage/ChunkRegionLoader.java b/src/main/java/net/minecraft/world/level/chunk/storage/ChunkRegionLoader.java
index ec2b238480413ba9c123d9ddeaa787d9520e1b74..bf96f9e538fc29ca914536e8a7ce727ebe43a8b2 100644
--- a/src/main/java/net/minecraft/world/level/chunk/storage/ChunkRegionLoader.java
+++ b/src/main/java/net/minecraft/world/level/chunk/storage/ChunkRegionLoader.java
@@ -468,6 +468,7 @@ public class ChunkRegionLoader {
     public static NBTTagCompound saveChunk(WorldServer worldserver, IChunkAccess ichunkaccess) {
         return saveChunk(worldserver, ichunkaccess, null);
     }
+    private static final ThreadLocal<int[]> paletteArray = ThreadLocal.withInitial(() -> new int[4096]); // Airplane
     public static NBTTagCompound saveChunk(WorldServer worldserver, IChunkAccess ichunkaccess, AsyncSaveData asyncsavedata) {
         // Paper end
         // Tuinity start - rewrite light impl
@@ -498,6 +499,7 @@ public class ChunkRegionLoader {
 
         NBTTagCompound nbttagcompound2;
 
+        int[] aint = paletteArray.get(); // Airplane - use cached
         for (int i = -1; i < 17; ++i) { // Paper - conflict on loop parameter change
             int finalI = i; // CraftBukkit - decompile errors
             ChunkSection chunksection = (ChunkSection) Arrays.stream(achunksection).filter((chunksection1) -> {
@@ -518,7 +520,7 @@ public class ChunkRegionLoader {
                 nbttagcompound2 = new NBTTagCompound();
                 nbttagcompound2.setByte("Y", (byte) (i & 255));
                 if (chunksection != Chunk.a) {
-                    chunksection.getBlocks().a(nbttagcompound2, "Palette", "BlockStates");
+                    chunksection.getBlocks().a(nbttagcompound2, "Palette", "BlockStates", aint); // Airplane
                 }
 
                 if (nibblearray != null && !nibblearray.c()) {
diff --git a/src/main/java/net/minecraft/world/level/material/FluidTypeFlowing.java b/src/main/java/net/minecraft/world/level/material/FluidTypeFlowing.java
index 6bb4ec00e40795ced73648fefcd1f5027e0113cd..b14b0134b42aa6d1eb285aa453ec6067cc702878 100644
--- a/src/main/java/net/minecraft/world/level/material/FluidTypeFlowing.java
+++ b/src/main/java/net/minecraft/world/level/material/FluidTypeFlowing.java
@@ -45,6 +45,8 @@ public abstract class FluidTypeFlowing extends FluidType {
 
     public static final BlockStateBoolean FALLING = BlockProperties.i;
     public static final BlockStateInteger LEVEL = BlockProperties.at;
+    // Airplane start - use our own threadlocal cache
+    /*
     private static final ThreadLocal<Object2ByteLinkedOpenHashMap<Block.a>> e = ThreadLocal.withInitial(() -> {
         Object2ByteLinkedOpenHashMap<Block.a> object2bytelinkedopenhashmap = new Object2ByteLinkedOpenHashMap<Block.a>(200) {
             protected void rehash(int i) {}
@@ -53,6 +55,13 @@ public abstract class FluidTypeFlowing extends FluidType {
         object2bytelinkedopenhashmap.defaultReturnValue((byte) 127);
         return object2bytelinkedopenhashmap;
     });
+     */
+    private static final ThreadLocal<gg.airplane.structs.FluidDirectionCache<Block.a>> localFluidDirectionCache = ThreadLocal.withInitial(() -> {
+        // Airplane todo - mess with this number for performance
+        //  with 1024 it seems very infrequent on a small world that it has to remove old entries
+        return new gg.airplane.structs.FluidDirectionCache<>(1024);
+    });
+    // Airplane end
     private final Map<Fluid, VoxelShape> f = Maps.newIdentityHashMap();
 
     public FluidTypeFlowing() {}
@@ -240,6 +249,8 @@ public abstract class FluidTypeFlowing extends FluidType {
     }
 
     private boolean a(EnumDirection enumdirection, IBlockAccess iblockaccess, BlockPosition blockposition, IBlockData iblockdata, BlockPosition blockposition1, IBlockData iblockdata1) {
+        // Airplane start - modify to use our cache
+        /*
         Object2ByteLinkedOpenHashMap object2bytelinkedopenhashmap;
 
         if (!iblockdata.getBlock().o() && !iblockdata1.getBlock().o()) {
@@ -247,9 +258,16 @@ public abstract class FluidTypeFlowing extends FluidType {
         } else {
             object2bytelinkedopenhashmap = null;
         }
+         */
+        gg.airplane.structs.FluidDirectionCache<Block.a> cache = null;
+
+        if (!iblockdata.getBlock().isComplexHitbox() && !iblockdata1.getBlock().isComplexHitbox()) {
+            cache = localFluidDirectionCache.get();
+        }
 
         Block.a block_a;
 
+        /*
         if (object2bytelinkedopenhashmap != null) {
             block_a = new Block.a(iblockdata, iblockdata1, enumdirection);
             byte b0 = object2bytelinkedopenhashmap.getAndMoveToFirst(block_a);
@@ -260,11 +278,22 @@ public abstract class FluidTypeFlowing extends FluidType {
         } else {
             block_a = null;
         }
+         */
+        if (cache != null) {
+            block_a = new Block.a(iblockdata, iblockdata1, enumdirection);
+            Boolean flag = cache.getValue(block_a);
+            if (flag != null) {
+                return flag;
+            }
+        } else {
+            block_a = null;
+        }
 
         VoxelShape voxelshape = iblockdata.getCollisionShape(iblockaccess, blockposition);
         VoxelShape voxelshape1 = iblockdata1.getCollisionShape(iblockaccess, blockposition1);
         boolean flag = !VoxelShapes.b(voxelshape, voxelshape1, enumdirection);
 
+        /*
         if (object2bytelinkedopenhashmap != null) {
             if (object2bytelinkedopenhashmap.size() == 200) {
                 object2bytelinkedopenhashmap.removeLastByte();
@@ -272,6 +301,11 @@ public abstract class FluidTypeFlowing extends FluidType {
 
             object2bytelinkedopenhashmap.putAndMoveToFirst(block_a, (byte) (flag ? 1 : 0));
         }
+         */
+        if (cache != null) {
+            cache.putValue(block_a, flag);
+        }
+        // Airplane end
 
         return flag;
     }
diff --git a/src/main/java/net/minecraft/world/level/storage/loot/LootTableInfo.java b/src/main/java/net/minecraft/world/level/storage/loot/LootTableInfo.java
index 95d0c9f22d79194ca83ca6f6a8e6d91180a3c8da..20cc04be75ab202d4c4ee9a07e9876ceff8422ca 100644
--- a/src/main/java/net/minecraft/world/level/storage/loot/LootTableInfo.java
+++ b/src/main/java/net/minecraft/world/level/storage/loot/LootTableInfo.java
@@ -43,8 +43,8 @@ public class LootTableInfo {
         this.world = worldserver;
         this.d = function;
         this.f = function1;
-        this.h = ImmutableMap.copyOf(map);
-        this.i = ImmutableMap.copyOf(map1);
+        this.h = java.util.Collections.unmodifiableMap(map); // Airplane
+        this.i = java.util.Collections.unmodifiableMap(map1); // Airplane
     }
 
     public boolean hasContextParameter(LootContextParameter<?> lootcontextparameter) {
@@ -62,7 +62,7 @@ public class LootTableInfo {
 
     @Nullable
     public <T> T getContextParameter(LootContextParameter<T> lootcontextparameter) {
-        return this.h.get(lootcontextparameter);
+        return (T) this.h.get(lootcontextparameter); // Airplane - compile error
     }
 
     public boolean a(LootTable loottable) {
@@ -216,7 +216,7 @@ public class LootTableInfo {
         }
 
         public <T> T a(LootContextParameter<T> lootcontextparameter) {
-            T t0 = this.b.get(lootcontextparameter);
+            T t0 = (T) this.b.get(lootcontextparameter); // Airplane - compile error
 
             if (t0 == null) {
                 throw new IllegalArgumentException("No parameter " + lootcontextparameter);
@@ -227,7 +227,7 @@ public class LootTableInfo {
 
         @Nullable
         public <T> T b(LootContextParameter<T> lootcontextparameter) {
-            return this.b.get(lootcontextparameter);
+            return (T) this.b.get(lootcontextparameter); // Airplane - compile error
         }
 
         public LootTableInfo build(LootContextParameterSet lootcontextparameterset) {
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftServer.java b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
index fd3333fef4112e6469ccd316ba2c82926c04e5db..aec6c036ed42078a6cc3540f1f6e46a551e87a2f 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftServer.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
@@ -232,7 +232,7 @@ import javax.annotation.Nullable; // Paper
 import javax.annotation.Nonnull; // Paper
 
 public final class CraftServer implements Server {
-    private final String serverName = "Tuinity"; // Paper // Tuinity
+    private final String serverName = "Airplane"; // Paper // Tuinity // Airplane
     private final String serverVersion;
     private final String bukkitVersion = Versioning.getBukkitVersion();
     private final Logger logger = Logger.getLogger("Minecraft");
@@ -978,6 +978,11 @@ public final class CraftServer implements Server {
                 plugin.getDescription().getName(),
                 "This plugin is not properly shutting down its async tasks when it is being shut down. This task may throw errors during the final shutdown logs and might not complete before process dies."
             ));
+            getLogger().log(Level.SEVERE, String.format("%s Stacktrace", worker.getThread().getName()));
+            StackTraceElement[] stackTrace = worker.getThread().getStackTrace();
+            for (StackTraceElement element : stackTrace) {
+                getLogger().log(Level.SEVERE, "  " + element.toString());
+            }
         }
     }
     // Paper end
diff --git a/src/main/java/org/bukkit/craftbukkit/inventory/CraftShapelessRecipe.java b/src/main/java/org/bukkit/craftbukkit/inventory/CraftShapelessRecipe.java
index de9c5ed6b03a290fe77eec719f0079fd7bd9b7f5..8c02f6fdffb59153712a3be778f9c454fd87b73b 100644
--- a/src/main/java/org/bukkit/craftbukkit/inventory/CraftShapelessRecipe.java
+++ b/src/main/java/org/bukkit/craftbukkit/inventory/CraftShapelessRecipe.java
@@ -44,6 +44,6 @@ public class CraftShapelessRecipe extends ShapelessRecipe implements CraftRecipe
             data.set(i, toNMS(ingred.get(i), true));
         }
 
-        MinecraftServer.getServer().getCraftingManager().addRecipe(new ShapelessRecipes(CraftNamespacedKey.toMinecraft(this.getKey()), this.getGroup(), CraftItemStack.asNMSCopy(this.getResult()), data));
+        MinecraftServer.getServer().getCraftingManager().addRecipe(new ShapelessRecipes(CraftNamespacedKey.toMinecraft(this.getKey()), this.getGroup(), CraftItemStack.asNMSCopy(this.getResult()), data, true)); // Airplane
     }
 }
diff --git a/src/main/java/org/bukkit/craftbukkit/scheduler/MinecraftInternalPlugin.java b/src/main/java/org/bukkit/craftbukkit/scheduler/MinecraftInternalPlugin.java
index 49dc0c441b9dd7e7745cf15ced67f383ebee1f99..b343d8ee7435312929558efdaf127334d8e2fff6 100644
--- a/src/main/java/org/bukkit/craftbukkit/scheduler/MinecraftInternalPlugin.java
+++ b/src/main/java/org/bukkit/craftbukkit/scheduler/MinecraftInternalPlugin.java
@@ -19,7 +19,8 @@ public class MinecraftInternalPlugin extends PluginBase {
     private boolean enabled = true;
 
     private final String pluginName;
-    private PluginDescriptionFile pdf;
+    private org.bukkit.plugin.PluginLogger logger;
+    private PluginDescriptionFile pdf; // Airplane
 
     public MinecraftInternalPlugin() {
         this.pluginName = "Minecraft";
@@ -72,7 +73,12 @@ public class MinecraftInternalPlugin extends PluginBase {
 
     @Override
     public PluginLogger getLogger() {
-        throw new UnsupportedOperationException("Not supported.");
+        // Airplane start
+        if (this.logger == null) {
+            this.logger = new org.bukkit.plugin.PluginLogger(this); // Airplane
+        }
+        return this.logger;
+        // Airplane end
     }
 
     @Override
@@ -82,7 +88,7 @@ public class MinecraftInternalPlugin extends PluginBase {
 
     @Override
     public Server getServer() {
-        throw new UnsupportedOperationException("Not supported.");
+        return org.bukkit.Bukkit.getServer(); // Airplane - impl
     }
 
     @Override
diff --git a/src/main/java/org/bukkit/craftbukkit/util/Versioning.java b/src/main/java/org/bukkit/craftbukkit/util/Versioning.java
index 001b1e5197eaa51bfff9031aa6c69876c9a47960..1788d79ea489e446d3d9f541693d4ba3dfc26015 100644
--- a/src/main/java/org/bukkit/craftbukkit/util/Versioning.java
+++ b/src/main/java/org/bukkit/craftbukkit/util/Versioning.java
@@ -11,7 +11,7 @@ public final class Versioning {
     public static String getBukkitVersion() {
         String result = "Unknown-Version";
 
-        InputStream stream = Bukkit.class.getClassLoader().getResourceAsStream("META-INF/maven/com.tuinity/tuinity-api/pom.properties"); // Tuinity
+        InputStream stream = Bukkit.class.getClassLoader().getResourceAsStream("META-INF/maven/gg.airplane/airplane-api/pom.properties"); // Tuinity // Airplane
         Properties properties = new Properties();
 
         if (stream != null) {
diff --git a/src/main/java/org/spigotmc/ActivationRange.java b/src/main/java/org/spigotmc/ActivationRange.java
index 5c2eaca0bc63c7880ee928aba6a24761737aa649..94910bf0c53c79588c55b89e4a023273d6c859ef 100644
--- a/src/main/java/org/spigotmc/ActivationRange.java
+++ b/src/main/java/org/spigotmc/ActivationRange.java
@@ -47,6 +47,9 @@ import net.minecraft.world.entity.schedule.Activity;
 import net.minecraft.world.entity.item.EntityFallingBlock;
 import net.minecraft.world.entity.projectile.EntityEnderSignal;
 // Paper end
+// Airplane start
+import net.minecraft.world.phys.Vec3D;
+// Airplane end
 
 public class ActivationRange
 {
@@ -227,7 +230,7 @@ public class ActivationRange
                     Chunk chunk = chunkProvider.getChunkAtIfLoadedMainThreadNoCache( i1, j1 ); // Paper
                     if ( chunk != null )
                     {
-                        activateChunkEntities( chunk );
+                        activateChunkEntities( chunk, player.getPositionVector() ); // Airplane
                     }
                 }
             }
@@ -240,7 +243,7 @@ public class ActivationRange
      *
      * @param chunk
      */
-    private static void activateChunkEntities(Chunk chunk)
+    private static void activateChunkEntities(Chunk chunk, Vec3D playerVec) // Airplane - add player location
     {
         // Paper start
         Entity[] rawData = chunk.entities.getRawData();
@@ -249,6 +252,15 @@ public class ActivationRange
             //for ( Entity entity : (Collection<Entity>) slice )
             // Paper end
             {
+                // Airplane start
+                Vec3D entityVec = entity.getPositionVector();
+                double diffX = playerVec.x - entityVec.x, diffY = playerVec.y - entityVec.y, diffZ = playerVec.z - entityVec.z;
+                int squaredDistance = (int) (diffX * diffX + diffY * diffY + diffZ * diffZ);
+                entity.activatedPriority = squaredDistance > gg.airplane.AirplaneConfig.startDistanceSquared ?
+                  Math.max(1, Math.min(squaredDistance >> gg.airplane.AirplaneConfig.activationDistanceMod, gg.airplane.AirplaneConfig.maximumActivationPrio)) :
+                  1;
+                // Airplane end
+
                 if (MinecraftServer.currentTick > entity.activatedTick) {
                     if (entity.defaultActivationState || entity.activationType.boundingBox.c(entity.getBoundingBox())) { // Paper
                         entity.activatedTick = MinecraftServer.currentTick;
@@ -297,7 +309,7 @@ public class ActivationRange
         if ( entity instanceof EntityLiving )
         {
             EntityLiving living = (EntityLiving) entity;
-            if ( living.isClimbing() || living.jumping || living.hurtTicks > 0 || living.effects.size() > 0 ) // Paper
+            if ( living.isClimbingCached() || living.jumping || living.hurtTicks > 0 || living.effects.size() > 0 ) // Paper // Airplane - use cached climbing
             {
                 return 1; // Paper
             }