From 55a8e5f7496f9d7819f01fbd2488b3c09ff32a15 Mon Sep 17 00:00:00 2001
From: Joseph Hirschfeld <joe@ibj.io>
Date: Thu, 3 Mar 2016 02:39:54 -0600
Subject: [PATCH] Change implementation of (tile)entity removal list

use sets for faster removal

diff --git a/src/main/java/net/minecraft/server/World.java b/src/main/java/net/minecraft/server/World.java
index 8d72146760..c4d476eb61 100644
--- a/src/main/java/net/minecraft/server/World.java
+++ b/src/main/java/net/minecraft/server/World.java
@@ -40,7 +40,7 @@ public abstract class World implements IIBlockAccess, GeneratorAccess, AutoClose
     public final List<TileEntity> tileEntityList = Lists.newArrayList();
     public final List<TileEntity> tileEntityListTick = Lists.newArrayList();
     protected final List<TileEntity> tileEntityListPending = Lists.newArrayList();
-    protected final List<TileEntity> tileEntityListUnload = Lists.newArrayList();
+    protected final java.util.Set<TileEntity> tileEntityListUnload = com.google.common.collect.Sets.newHashSet(); // Paper
     private final long b = 16777215L;
     private final Thread serverThread;
     private int d;
-- 
2.21.0