From b3b4eb9469067c56b7ed140b5e473f374bead215 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Wed, 27 Apr 2016 22:09:52 -0400
Subject: [PATCH] Improve Minecraft Hopper Performance

Removes unnecessary extra calls to .update() that are very expensive
Also reset cooldown each hopper tick that a hopper is full.

diff --git a/src/main/java/net/minecraft/server/TileEntity.java b/src/main/java/net/minecraft/server/TileEntity.java
index 9fa93ed..cd39fe5 100644
--- a/src/main/java/net/minecraft/server/TileEntity.java
+++ b/src/main/java/net/minecraft/server/TileEntity.java
@@ -36,6 +36,7 @@ public abstract class TileEntity {
         }
     }
 
+    static boolean IGNORE_TILE_UPDATES = false; // Paper
     public World getWorld() {
         return this.world;
     }
@@ -113,6 +114,7 @@ public abstract class TileEntity {
 
     public void update() {
         if (this.world != null) {
+            if (IGNORE_TILE_UPDATES) return; // Paper
             IBlockData iblockdata = this.world.getType(this.position);
 
             this.h = iblockdata.getBlock().toLegacyData(iblockdata);
diff --git a/src/main/java/net/minecraft/server/TileEntityHopper.java b/src/main/java/net/minecraft/server/TileEntityHopper.java
index d1ce2b9..a651961 100644
--- a/src/main/java/net/minecraft/server/TileEntityHopper.java
+++ b/src/main/java/net/minecraft/server/TileEntityHopper.java
@@ -188,6 +188,7 @@ public class TileEntityHopper extends TileEntityLootable implements IHopper, ITi
                     return true;
                 }
             }
+
             return false;
         } else {
             return false;
@@ -499,7 +500,9 @@ public class TileEntityHopper extends TileEntityLootable implements IHopper, ITi
             boolean flag = false;
 
             if (itemstack1 == null) {
+                IGNORE_TILE_UPDATES = true; // Paper
                 iinventory.setItem(i, itemstack);
+                IGNORE_TILE_UPDATES = false; // Paper
                 itemstack = null;
                 flag = true;
             } else if (a(itemstack1, itemstack)) {
@@ -519,7 +522,7 @@ public class TileEntityHopper extends TileEntityLootable implements IHopper, ITi
                         tileentityhopper.setCooldown(tileentityhopper.world.spigotConfig.hopperTransfer); // Spigot
                     }
 
-                    iinventory.update();
+                    //iinventory.update(); // Paper
                 }
 
                 iinventory.update();
@@ -594,6 +597,7 @@ public class TileEntityHopper extends TileEntityLootable implements IHopper, ITi
         this.g = i;
     }
 
+    boolean isCooledDown() { return o(); } // Paper - OBFHELPER
     public boolean o() {
         return this.g > 0;
     }
-- 
2.9.3