PaperMC/Spigot-Server-Patches/0069-Use-a-Shared-Random-for-Entities.patch
Riley Park 4e958e229f
We're going on an Adventure! (#4842)
Co-authored-by: Jake Potrebic <jake.m.potrebic@gmail.com>
Co-authored-by: zml <zml@stellardrift.ca>
Co-authored-by: Mariell Hoversholm <proximyst@proximyst.com>
2021-02-21 20:45:33 +01:00

42 lines
1.7 KiB
Diff

From 0000000000000000000000000000000000000000 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 31857636a08eeb281b4d21dd72811d40eb00055c..dba28796a921beda2e5d15ba1565c55f54e36435 100644
--- a/src/main/java/net/minecraft/server/Entity.java
+++ b/src/main/java/net/minecraft/server/Entity.java
@@ -58,6 +58,21 @@ public abstract class Entity implements INamableTileEntity, ICommandListener, Ke
return tag.hasKey("Bukkit.updateLevel") && tag.getInt("Bukkit.updateLevel") >= level;
}
+ // 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
+
private CraftEntity bukkitEntity;
public CraftEntity getBukkitEntity() {
@@ -187,7 +202,7 @@ public abstract class Entity implements INamableTileEntity, ICommandListener, Ke
this.x = Vec3D.ORIGIN;
this.am = 1.0F;
this.an = 1.0F;
- this.random = new Random();
+ this.random = SHARED_RANDOM; // Paper
this.fireTicks = -this.getMaxFireTicks();
this.M = new Object2DoubleArrayMap(2);
this.justCreated = true;