Leaf/leaf-server/minecraft-patches/features/0073-Optimize-player-list-for-sending-player-info.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Martijn Muijsers <martijnmuijsers@live.nl>
Date: Tue, 29 Nov 2022 23:30:38 +0100
Subject: [PATCH] Optimize player list for sending player info

License: MIT (https://opensource.org/licenses/MIT)
Gale - https://galemc.org

This patch is based on the following patch:
"Spread out and optimise player list ticksSpread out and optimise player list ticks"
By: James Lyne <jim+github@not-null.co.uk>
As part of: Purpur (https://github.com/PurpurMC/Purpur)
Licensed under: MIT (https://opensource.org/licenses/MIT)

* Purpur copyright *

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diff --git a/net/minecraft/server/players/PlayerList.java b/net/minecraft/server/players/PlayerList.java
index 1ea70e63db1d5f05cdbace8be48160b26a480fee..4a3f06a4677348c1277669514f9acef7a4334f1d 100644
--- a/net/minecraft/server/players/PlayerList.java
+++ b/net/minecraft/server/players/PlayerList.java
@@ -913,10 +913,19 @@ public abstract class PlayerList {
         ServerPlayer[] sendAllPlayerInfoBucket = this.sendAllPlayerInfoBuckets[this.sendAllPlayerInfoIn];
 
         if (sendAllPlayerInfoBucket != null) {
-            for (ServerPlayer target : sendAllPlayerInfoBucket) {
+            for (ServerPlayer targetPlayer : sendAllPlayerInfoBucket) { // Gale - Purpur - optimize player list for sending player info
                 // Gale end - Purpur - spread out sending all player info
+                // Gale start - Purpur - optimize player list for sending player info
+                var target = targetPlayer.getBukkitEntity();
+                final List<ServerPlayer> list = new java.util.ArrayList<>(this.players.size());
+                for (ServerPlayer player : this.players) {
+                    if (target.canSeePlayer(player.getUUID())) {
+                        list.add(player);
+                    }
+                }
 
-                target.connection.send(new ClientboundPlayerInfoUpdatePacket(EnumSet.of(ClientboundPlayerInfoUpdatePacket.Action.UPDATE_LATENCY), com.google.common.collect.Collections2.filter(this.players, t -> target.getBukkitEntity().canSee(t.getBukkitEntity()))));
+                targetPlayer.connection.send(new ClientboundPlayerInfoUpdatePacket(EnumSet.of(ClientboundPlayerInfoUpdatePacket.Action.UPDATE_LATENCY), list));
+                // Gale end - Purpur - optimize player list for sending player info
             }
             // Gale start - Purpur - spread out sending all player info
         }