PaperMC/Spigot-Server-Patches/0098-Optimize-Chunk-Access.patch
2016-05-12 01:01:13 -04:00

66 lines
2.7 KiB
Diff

From 1917871be3d7d048b496022ef54eaf230ff2a900 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Thu, 27 Aug 2015 01:15:02 -0400
Subject: [PATCH] Optimize Chunk Access
getting a loaded chunk is one of the most hottest pieces of code in the game.
getChunkAt is called for the same chunk multiple times in a row, often from getType();
Optimize this look up by using a Last Access cache.
diff --git a/src/main/java/net/minecraft/server/Chunk.java b/src/main/java/net/minecraft/server/Chunk.java
index eb60455..22e4728 100644
--- a/src/main/java/net/minecraft/server/Chunk.java
+++ b/src/main/java/net/minecraft/server/Chunk.java
@@ -30,6 +30,7 @@ public class Chunk {
private boolean j;
public final World world;
public final int[] heightMap;
+ public final long chunkKey; // Paper
public final int locX;
public final int locZ;
private boolean m;
@@ -96,6 +97,7 @@ public class Chunk {
this.world = world;
this.locX = i;
this.locZ = j;
+ this.chunkKey = org.bukkit.craftbukkit.util.LongHash.toLong(this.locX, this.locZ); // Paper
this.heightMap = new int[256];
for (int k = 0; k < this.entitySlices.length; ++k) {
diff --git a/src/main/java/net/minecraft/server/ChunkProviderServer.java b/src/main/java/net/minecraft/server/ChunkProviderServer.java
index 32b71c6..3d36d7a 100644
--- a/src/main/java/net/minecraft/server/ChunkProviderServer.java
+++ b/src/main/java/net/minecraft/server/ChunkProviderServer.java
@@ -27,7 +27,27 @@ public class ChunkProviderServer implements IChunkProvider {
public final Set<Long> unloadQueue = Sets.newHashSet(); // PAIL: private -> public
public final ChunkGenerator chunkGenerator;
private final IChunkLoader chunkLoader;
- public final Long2ObjectMap<Chunk> chunks = new Long2ObjectOpenHashMap(8192);
+ // Paper start
+ protected Chunk lastChunkByPos = null;
+ public Long2ObjectOpenHashMap<Chunk> chunks = new Long2ObjectOpenHashMap<Chunk>(8192) {
+
+ @Override
+ public Chunk get(long key) {
+ if (lastChunkByPos != null && key == lastChunkByPos.chunkKey) {
+ return lastChunkByPos;
+ }
+ return lastChunkByPos = super.get(key);
+ }
+
+ @Override
+ public Chunk remove(long key) {
+ if (lastChunkByPos != null && key == lastChunkByPos.chunkKey) {
+ lastChunkByPos = null;
+ }
+ return super.remove(key);
+ }
+ }; // CraftBukkit
+ // Paper end
public final WorldServer world;
public ChunkProviderServer(WorldServer worldserver, IChunkLoader ichunkloader, ChunkGenerator chunkgenerator) {
--
2.8.2