From a3fb16787b296fde8ee82cb76d3a305233d8e5cf Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Tue, 28 Aug 2018 22:11:13 -0400
Subject: [PATCH] Use an EnumMap for Chunk Height Maps


diff --git a/src/main/java/net/minecraft/server/Chunk.java b/src/main/java/net/minecraft/server/Chunk.java
index ed6d0dce33..1d301dcb70 100644
--- a/src/main/java/net/minecraft/server/Chunk.java
+++ b/src/main/java/net/minecraft/server/Chunk.java
@@ -133,7 +133,7 @@ public class Chunk implements IChunkAccess {
         this.sections = new ChunkSection[16];
         this.g = new boolean[256];
         this.h = Maps.newHashMap();
-        this.heightMap = Maps.newHashMap();
+        this.heightMap = new java.util.EnumMap<>(HeightMap.Type.class); // PAper
         this.tileEntities = new TileEntityHashMap(); // Paper
         this.p = Maps.newHashMap();
         this.q = Maps.newHashMap();
-- 
2.18.0