Remove getCubes patch as under some circumstances it can loop around itself forever. For anyone wishing to reimplement this patch, the rationale behind it is quite simple, get all cubes within each chunk at the same time.

By: md_5 <git@md-5.net>

CraftBukkit-Patches/0021-Faster-UUID-for-entities.patch

@@ -0,0 +1,23 @@
+From 856b0c4a784349869639493b3bbdbbe1d2bae9dc 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.
+
+diff --git a/src/main/java/net/minecraft/server/Entity.java b/src/main/java/net/minecraft/server/Entity.java
+index 3e3d935..a3a8750 100644
+--- a/src/main/java/net/minecraft/server/Entity.java
++++ b/src/main/java/net/minecraft/server/Entity.java
+@@ -138,7 +138,7 @@ public abstract class Entity {
+         this.random = new Random();
+         this.maxFireTicks = 1;
+         this.justCreated = true;
+-        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);
+-- 
+1.8.3.2
+