Little more progress

Keep getting interrupted so not as much as I'd like :(

Spigot-Server-Patches/Optimize-RegistryMaterials.patch

@@ -8,7 +8,7 @@ Use larger initial sizes to increase bucket capacity on the BiMap
 BiMap.get was seen to be using a good bit of CPU time.
 
 diff --git a/src/main/java/net/minecraft/server/RegistryMaterials.java b/src/main/java/net/minecraft/server/RegistryMaterials.java
-index f291e05b26..fed38e6ef0 100644
+index 2d6a7b3a4..8477febca 100644
 --- a/src/main/java/net/minecraft/server/RegistryMaterials.java
 +++ b/src/main/java/net/minecraft/server/RegistryMaterials.java
 @@ -0,0 +0,0 @@ import org.apache.logging.log4j.Logger;
@@ -17,20 +17,17 @@ index f291e05b26..fed38e6ef0 100644
      protected static final Logger LOGGER = LogManager.getLogger();
 -    protected final RegistryID<T> b = new RegistryID<>(256);
 -    protected final BiMap<MinecraftKey, T> c = HashBiMap.create();
--    protected Object[] d;
 +    protected final RegistryID<T> b = new RegistryID<>(2048); // Paper - use bigger expected size to reduce collisions
 +    protected final BiMap<MinecraftKey, T> c = HashBiMap.create(2048); // Paper - use bigger expected size to reduce collisions
-+    protected T[] d; // Paper - Decompile fix
-     private int R;
+     protected Object[] d;
+     private int V;
  
-     public RegistryMaterials() {}
 @@ -0,0 +0,0 @@ public class RegistryMaterials<T> extends IRegistryWritable<T> {
-                 return null;
-             }
- 
--            this.d = collection.toArray(new Object[collection.size()]);
-+            this.d = (T[]) collection.toArray(new Object[collection.size()]); // Paper - Decompile fix
+             this.d = collection.toArray(new Object[collection.size()]);
          }
  
-         return this.d[random.nextInt(this.d.length)];
+-        return this.d[random.nextInt(this.d.length)];
++        return (T) this.d[random.nextInt(this.d.length)]; // Paper - Decompile fix
+     }
+ }
 --