PaperMC/Spigot-Server-Patches/Fix-MC-117075-TE-Unload-Lag-Spike.patch
Aikar 29399ffc02 Numerous fixes to entity related changes
While it wasn't really "broken" before, if plugins use NMS
(which they really should't be) and mess with entity management
themselves, and get it wrong, they could ultimately corrupt our
state expectations.

I've been unable to reproduce any issues locally, but these changes
are the result of me analyzing the code pretty deeply and seeing
about how to make it more durable to abnormal usage.

Any servers seeing oddities, please run with -Ddebug.entities=true
and send me any logs triggered.
2019-04-05 23:08:45 -04:00

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: mezz <tehgeek@gmail.com>
Date: Wed, 9 Aug 2017 17:51:22 -0500
Subject: [PATCH] Fix MC-117075: TE Unload Lag Spike
diff --git a/src/main/java/net/minecraft/server/World.java b/src/main/java/net/minecraft/server/World.java
index 5e1ab431dc..cdb430ef4f 100644
--- a/src/main/java/net/minecraft/server/World.java
+++ b/src/main/java/net/minecraft/server/World.java
@@ -0,0 +0,0 @@ public abstract class World implements IEntityAccess, GeneratorAccess, IIBlockAc
this.methodProfiler.exitEnter("blockEntities");
timings.tileEntityTick.startTiming(); // Spigot
if (!this.tileEntityListUnload.isEmpty()) {
- this.tileEntityListTick.removeAll(this.tileEntityListUnload);
+ // Paper start - Use alternate implementation with faster contains
+ java.util.Set<TileEntity> toRemove = java.util.Collections.newSetFromMap(new java.util.IdentityHashMap<>());
+ toRemove.addAll(tileEntityListUnload);
+ this.tileEntityListTick.removeAll(toRemove);
+ // Paper end
//this.tileEntityList.removeAll(this.tileEntityListUnload); // Paper - remove unused list
this.tileEntityListUnload.clear();
}
--