From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: ishland <ishlandmc@yeah.net>
Date: Sat, 12 Mar 2022 16:03:35 +0100
Subject: [PATCH] vmp: use linked map for entity trackers for faster iteration

Copyright (c) 2021-2022 ishland

Original code by RelativityMC, licensed under MIT
You can find the original code on https://github.com/RelativityMC/VMP-fabric (Yarn mappings)

diff --git a/src/main/java/net/minecraft/server/level/ChunkMap.java b/src/main/java/net/minecraft/server/level/ChunkMap.java
index 364d899f4fba65f0ecae522c7dde4f1ef8ee632e..6ae3f09f01e7ad72d46aeb950cca83b0d2a8d88b 100644
--- a/src/main/java/net/minecraft/server/level/ChunkMap.java
+++ b/src/main/java/net/minecraft/server/level/ChunkMap.java
@@ -117,6 +117,7 @@ import org.bukkit.entity.Player;
 // CraftBukkit end
 
 import it.unimi.dsi.fastutil.objects.ReferenceOpenHashSet; // Paper
+import it.unimi.dsi.fastutil.ints.Int2ObjectLinkedOpenHashMap; // DivineMC - vmp: use linked map for entity trackers for faster iteration
 
 public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider {
 
@@ -298,7 +299,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
         // Paper - rewrite chunk system
         this.tickingGenerated = new AtomicInteger();
         this.playerMap = new PlayerMap();
-        this.entityMap = new Int2ObjectOpenHashMap();
+        this.entityMap = new Int2ObjectLinkedOpenHashMap<>(); // DivineMC - vmp: use linked map for entity trackers for faster iteration
         this.chunkTypeCache = new Long2ByteOpenHashMap();
         this.chunkSaveCooldowns = new Long2LongOpenHashMap();
         this.unloadQueue = Queues.newConcurrentLinkedQueue();