papermc/CraftBukkit-Patches/0034-Faster-UUID-for-entities.patch

From 8946198a7009f0a3f35c0a4d6c049b83a4b4bf21 Mon Sep 17 00:00:00 2001
From: md_5 <md_5@live.com.au>
Date: Sun, 17 Mar 2013 19:02:50 +1100
Subject: [PATCH] Faster UUID for entities

It is overkill to create a new SecureRandom on each entity create and then use it to make a new Entity ID for every entity instance created. Instead we will just use a pseudo random UUID based off the random instance we already have.
---
 src/main/java/net/minecraft/server/Entity.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/main/java/net/minecraft/server/Entity.java b/src/main/java/net/minecraft/server/Entity.java
index 482fecb..52ecc09 100644
--- a/src/main/java/net/minecraft/server/Entity.java
+++ b/src/main/java/net/minecraft/server/Entity.java
@@ -154,7 +154,7 @@ public abstract class Entity {
         this.ai = false;
         this.as = 0;
         this.invulnerable = false;
-        this.uniqueID = UUID.randomUUID();
+        this.uniqueID = new UUID(random.nextLong(), random.nextLong()); // Spigot
         this.at = EnumEntitySize.SIZE_2;
         this.world = world;
         this.setPosition(0.0D, 0.0D, 0.0D);
-- 
1.8.2.1