From 21c88e53a02069dab8e9e1606d4c6d62eeac08ff Mon Sep 17 00:00:00 2001 From: Aikar 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