From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: James Lyne <jim+github@not-null.co.uk>
Date: Mon, 7 Dec 2020 17:52:36 +0000
Subject: [PATCH] Spread out and optimise player list ticksSpread out and
 optimise player list ticks


diff --git a/src/main/java/net/minecraft/server/players/PlayerList.java b/src/main/java/net/minecraft/server/players/PlayerList.java
index a4a895a54ad0266301d50f95eaec3a2bb604f8f1..cdb40088112bf86becc9f08d002d7a7c06b65df8 100644
--- a/src/main/java/net/minecraft/server/players/PlayerList.java
+++ b/src/main/java/net/minecraft/server/players/PlayerList.java
@@ -1021,22 +1021,22 @@ public abstract class PlayerList {
     }
 
     public void tick() {
-        if (++this.sendAllPlayerInfoIn > 600) {
-            // CraftBukkit start
-            for (int i = 0; i < this.players.size(); ++i) {
-                final ServerPlayer target = (ServerPlayer) this.players.get(i);
-
-                target.connection.send(new ClientboundPlayerInfoPacket(ClientboundPlayerInfoPacket.Action.UPDATE_LATENCY, this.players.stream().filter(new Predicate<ServerPlayer>() {
-                    @Override
-                    public boolean apply(ServerPlayer input) {
-                        return target.getBukkitEntity().canSee(input.getBukkitEntity());
-                    }
-                }).collect(Collectors.toList())));
+        // Purpur start
+        if (this.sendAllPlayerInfoIn < this.players.size()) {
+            final org.bukkit.craftbukkit.entity.CraftPlayer target = this.players.get(this.sendAllPlayerInfoIn).getBukkitEntity();
+            final List<ServerPlayer> list = new java.util.ArrayList<>();
+            for (ServerPlayer player : this.players) {
+                if (target.canSee(player.getUUID())) {
+                    list.add(player);
+                }
             }
-            // CraftBukkit end
-            this.sendAllPlayerInfoIn = 0;
+            target.getHandle().connection.send(new ClientboundPlayerInfoPacket(ClientboundPlayerInfoPacket.Action.UPDATE_LATENCY, list));
         }
 
+        if (++this.sendAllPlayerInfoIn > 600) {
+            this.sendAllPlayerInfoIn = 0;
+        }
+        // Purpur end
     }
 
     public void broadcastAll(Packet<?> packet) {
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
index 69db9fb3b319b7f43d93375e719ec13c67388dff..eef64bca59a9b1558d83eb178e988d45281d4638 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
@@ -1699,7 +1699,13 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
 
     @Override
     public boolean canSee(org.bukkit.entity.Entity entity) {
-        return !this.hiddenEntities.containsKey(entity.getUniqueId());
+        // Purpur start
+        return this.canSee(entity.getUniqueId());
+    }
+
+    public boolean canSee(UUID uuid) {
+        return !this.hiddenEntities.containsKey(uuid);
+        // Purpur end
     }
 
     @Override