From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Martijn Muijsers <martijnmuijsers@live.nl>
Date: Thu, 1 Dec 2022 14:40:03 +0100
Subject: [PATCH] Use linked map for entity trackers

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

This patch is based on the following mixin:
"com/ishland/vmp/mixins/entitytracker/MixinThreadedAnvilChunkStorage.java"
By: ishland <ishlandmc@yeah.net>
As part of: VMP (https://github.com/RelativityMC/VMP-fabric)
Licensed under: MIT (https://opensource.org/licenses/MIT)

diff --git a/src/main/java/net/minecraft/server/level/ChunkMap.java b/src/main/java/net/minecraft/server/level/ChunkMap.java
index a9b6f3ceb45ecd6bcc6d6acc097a5d12aeaae620..e623490b47842114f0bd1c96d806be43dc0447ca 100644
--- a/src/main/java/net/minecraft/server/level/ChunkMap.java
+++ b/src/main/java/net/minecraft/server/level/ChunkMap.java
@@ -178,7 +178,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
         this.toDrop = new LongOpenHashSet();
         this.tickingGenerated = new AtomicInteger();
         this.playerMap = new PlayerMap();
-        this.entityMap = new Int2ObjectOpenHashMap();
+        this.entityMap = new it.unimi.dsi.fastutil.ints.Int2ObjectLinkedOpenHashMap(); // Gale - VMP - use linked map for entity trackers - provides faster iteration
         this.chunkTypeCache = new Long2ByteOpenHashMap();
         this.chunkSaveCooldowns = new Long2LongOpenHashMap();
         // Paper - rewrite chunk system