papermc/Spigot-Server-Patches/0070-Use-a-Shared-Random-for-Entities.patch
Shane Freeder 9946cef8c5
Updated Upstream (Bukkit/CraftBukkit/Spigot)
Upstream has released updates that appears to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing

Bukkit Changes:
f52c70ab Fix incorrect nullability in MultipleFacing
6af4c0b2 SPIGOT-5311: Add API to get/set item associated with throwable projectiles
97aeae56 Add set/isAware to disable Vanilla AI components of a Mob

CraftBukkit Changes:
fba9f487 Improve legacy conversion of some materials that changed post flattening
b1ba8749 Move Bukkit.Aware loading/saving to correct location
f7cdb53c SPIGOT-5311: Add API to get/set item associated with throwable projectiles
689f429c #634: Cross platform patch scripts
ab85433d Add set/isAware to disable Vanilla AI components of a Mob

Spigot Changes:
8faa8b45 Rebuild patches
2020-02-21 17:52:20 +00:00

45 lines
1.7 KiB
Diff

From 21c88e53a02069dab8e9e1606d4c6d62eeac08ff 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 d95d9c7203..4f81321b94 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() {
@@ -192,7 +207,7 @@ public abstract class Entity implements INamableTileEntity, ICommandListener, Ke
this.y = 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);
--
2.25.0