Paper/CraftBukkit-Patches/0043-Entity-ticking-chunk-caching.patch
2014-04-12 14:18:37 +10:00

67 lines
3.3 KiB
Diff

From 78f07fc5afe8f2620fcdaf65bfbbdeff0f38d793 Mon Sep 17 00:00:00 2001
From: Ammar Askar <ammar@ammaraskar.com>
Date: Tue, 16 Jul 2013 03:32:32 +0500
Subject: [PATCH] Entity ticking chunk caching
Cache known loaded chunks so we avoid making a potentially expensive contains call for every single entity in exchange for some simple arithmetic. Best case scenario, this cuts down contains call to once per chunk, worst case it adds on some simple arithmetic operations
diff --git a/src/main/java/net/minecraft/server/World.java b/src/main/java/net/minecraft/server/World.java
index 96b5bc7..b0b9757 100644
--- a/src/main/java/net/minecraft/server/World.java
+++ b/src/main/java/net/minecraft/server/World.java
@@ -1186,6 +1186,7 @@ public abstract class World implements IBlockAccess {
CrashReport crashreport;
CrashReportSystemDetails crashreportsystemdetails;
+ long lastChunk = Long.MIN_VALUE; // Spigot - cache chunk x, z cords for unload queue
for (i = 0; i < this.i.size(); ++i) {
entity = (Entity) this.i.get(i);
// CraftBukkit start - Fixed an NPE, don't process entities in chunks queued for unload
@@ -1194,10 +1195,15 @@ public abstract class World implements IBlockAccess {
}
ChunkProviderServer chunkProviderServer = ((WorldServer) this).chunkProviderServer;
- if (chunkProviderServer.unloadQueue.contains(MathHelper.floor(entity.locX) >> 4, MathHelper.floor(entity.locZ) >> 4)) {
- continue;
+ // Spigot start - check last chunk to see if this loaded (fast cache)
+ long chunk = org.bukkit.craftbukkit.util.LongHash.toLong(MathHelper.floor(entity.locX) >> 4, MathHelper.floor(entity.locZ) >> 4);
+ if (lastChunk != chunk) {
+ if (chunkProviderServer.unloadQueue.contains(chunk)) { // Spigot end
+ continue;
+ }
}
// CraftBukkit end
+ lastChunk = chunk; // Spigot
try {
++entity.ticksLived;
@@ -1218,6 +1224,7 @@ public abstract class World implements IBlockAccess {
this.i.remove(i--);
}
}
+ lastChunk = Long.MIN_VALUE; // Spigot
this.methodProfiler.c("remove");
this.entityList.removeAll(this.f);
@@ -1249,10 +1256,15 @@ public abstract class World implements IBlockAccess {
// Don't tick entities in chunks queued for unload
ChunkProviderServer chunkProviderServer = ((WorldServer) this).chunkProviderServer;
- if (chunkProviderServer.unloadQueue.contains(MathHelper.floor(entity.locX) >> 4, MathHelper.floor(entity.locZ) >> 4)) {
- continue;
+ // Spigot start - check last chunk to see if this loaded (fast cache)
+ long chunk = org.bukkit.craftbukkit.util.LongHash.toLong(MathHelper.floor(entity.locX) >> 4, MathHelper.floor(entity.locZ) >> 4);
+ if (lastChunk != chunk) {
+ if (chunkProviderServer.unloadQueue.contains(chunk)) { // Spigot end
+ continue;
+ }
}
// CraftBukkit end
+ lastChunk = Long.MIN_VALUE; // Spigot
if (entity.vehicle != null) {
if (!entity.vehicle.dead && entity.vehicle.passenger == entity) {
--
1.8.3.2