PaperMC/Spigot-Server-Patches/0313-World-EntityHuman-Lookup-Optimizations.patch
Aikar 9dc4d6448b
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

82 lines
3.5 KiB
Diff

From 28a9ac54731e4f544a428ad3e267f26d96370d4d Mon Sep 17 00:00:00 2001
From: willies952002 <admin@domnian.com>
Date: Mon, 30 Jul 2018 02:42:49 -0400
Subject: [PATCH] World EntityHuman Lookup Optimizations
diff --git a/src/main/java/net/minecraft/server/World.java b/src/main/java/net/minecraft/server/World.java
index 5d60b36678..3acea908c2 100644
--- a/src/main/java/net/minecraft/server/World.java
+++ b/src/main/java/net/minecraft/server/World.java
@@ -76,6 +76,7 @@ public abstract class World implements IEntityAccess, GeneratorAccess, IIBlockAc
private final List<TileEntity> c = Lists.newArrayList();
private final Set<TileEntity> tileEntityListUnload = com.google.common.collect.Sets.newHashSet(); // Paper
public final List<EntityHuman> players = Lists.newArrayList();
+ public final Map<String, EntityHuman> playersByName = Maps.newHashMap(); // Paper - World EntityHuman Lookup Optimizations
public final List<Entity> k = Lists.newArrayList();
protected final IntHashMap<Entity> entitiesById = new IntHashMap<>();
private final long F = 16777215L;
@@ -1030,6 +1031,8 @@ public abstract class World implements IEntityAccess, GeneratorAccess, IIBlockAc
EntityHuman entityhuman = (EntityHuman) entity;
this.players.add(entityhuman);
+ this.playersByName.put(entityhuman.getName(), entityhuman);
+ // Paper end
this.everyoneSleeping();
}
@@ -1072,6 +1075,7 @@ public abstract class World implements IEntityAccess, GeneratorAccess, IIBlockAc
entity.die();
if (entity instanceof EntityHuman) {
this.players.remove(entity);
+ this.playersByName.remove(entity.getName()); // Paper - World EntityHuman Lookup Optimizations
// Spigot start
for ( WorldPersistentData worldData : worldMaps.worldMap.values() )
{
@@ -1105,6 +1109,7 @@ public abstract class World implements IEntityAccess, GeneratorAccess, IIBlockAc
entity.die();
if (entity instanceof EntityHuman) {
this.players.remove(entity);
+ this.playersByName.remove(entity.getName()); // Paper - World EntityHuman Lookup Optimizations
this.everyoneSleeping();
}
@@ -2667,6 +2672,8 @@ public abstract class World implements IEntityAccess, GeneratorAccess, IIBlockAc
@Nullable
public EntityHuman a(String s) {
+ // Paper start - World EntityHuman Lookup Optimizations
+ /*
for (int i = 0; i < this.players.size(); ++i) {
EntityHuman entityhuman = (EntityHuman) this.players.get(i);
@@ -2676,10 +2683,15 @@ public abstract class World implements IEntityAccess, GeneratorAccess, IIBlockAc
}
return null;
+ */
+ return this.playersByName.get(s);
+ // Paper end
}
@Nullable
public EntityHuman b(UUID uuid) {
+ // Paper start - World EntityHuman Lookup Optimizations
+ /*
for (int i = 0; i < this.players.size(); ++i) {
EntityHuman entityhuman = (EntityHuman) this.players.get(i);
@@ -2689,6 +2701,10 @@ public abstract class World implements IEntityAccess, GeneratorAccess, IIBlockAc
}
return null;
+ */
+ Entity entity = ((WorldServer)this).entitiesByUUID.get(uuid);
+ return entity instanceof EntityHuman ? (EntityHuman) entity : null;
+ // Paper end
}
public void checkSession() throws ExceptionWorldConflict {
--
2.21.0