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Paper/Spigot-Server-Patches/0071-Use-a-Shared-Random-for-Entities.patch
Zach Brown 70ce6ce831
Move version command update checking to the implementation
This makes it easier for downstream projects (forks) to replace the
version fetching system with their own. It is as simple as implementing
an interface and overriding the default implementation of
org.bukkit.UnsafeValues#getVersionFetcher()

It also makes it easier for us to organize things like the version
history feature.

Lastly I have updated the paper implementation to check against the site
API rather than against jenkins.
2019-05-27 04:13:41 -05:00

45 Zeilen
1.7 KiB
Diff

From 1790da3e00864266af558508ed1f31980376431a Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Tue, 22 Mar 2016 00:33:47 -0400
Subject: [PATCH] Use a Shared Random for Entities
Reduces memory usage and provides ensures more randomness, Especially since a lot of garbage entity objects get created.
diff --git a/src/main/java/net/minecraft/server/Entity.java b/src/main/java/net/minecraft/server/Entity.java
index da9971445..e6e47bc57 100644
--- a/src/main/java/net/minecraft/server/Entity.java
+++ b/src/main/java/net/minecraft/server/Entity.java
@@ -54,6 +54,20 @@ public abstract class Entity implements INamableTileEntity, ICommandListener, Ke
// CraftBukkit start
private static final int CURRENT_LEVEL = 2;
+ // Paper start
+ public static Random SHARED_RANDOM = new Random() {
+ private boolean locked = false;
+ @Override
+ public synchronized void setSeed(long seed) {
+ if (locked) {
+ LogManager.getLogger().error("Ignoring setSeed on Entity.SHARED_RANDOM", new Throwable());
+ } else {
+ super.setSeed(seed);
+ locked = true;
+ }
+ }
+ };
+ // Paper end
static boolean isLevelAtLeast(NBTTagCompound tag, int level) {
return tag.hasKey("Bukkit.updateLevel") && tag.getInt("Bukkit.updateLevel") >= level;
}
@@ -189,7 +203,7 @@ public abstract class Entity implements INamableTileEntity, ICommandListener, Ke
this.B = Vec3D.a;
this.av = 1.0F;
this.aw = 1.0F;
- this.random = new Random();
+ this.random = SHARED_RANDOM; // Paper
this.fireTicks = -this.getMaxFireTicks();
this.justCreated = true;
this.uniqueID = MathHelper.a(this.random);
--
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