From 40fa0bc6f6838a9bb268864cc02a03b6c1e7e4d8 Mon Sep 17 00:00:00 2001
From: tr7zw <tr7zw@live.de>
Date: Thu, 25 Jun 2020 23:40:12 +0200
Subject: [PATCH] Heavily optimize furnance fuel and recipe lookups

---
 .../net/minecraft/server/CraftingManager.java | 19 +++++++++++++++-
 .../minecraft/server/TileEntityFurnace.java   | 22 +++++++++++++++++++
 2 files changed, 40 insertions(+), 1 deletion(-)

diff --git a/src/main/java/net/minecraft/server/CraftingManager.java b/src/main/java/net/minecraft/server/CraftingManager.java
index f27c7041c..384cb3c62 100644
--- a/src/main/java/net/minecraft/server/CraftingManager.java
+++ b/src/main/java/net/minecraft/server/CraftingManager.java
@@ -89,7 +89,24 @@ public class CraftingManager extends ResourceDataJson {
         }).findFirst();
         c0.setCurrentRecipe(recipe.orElse(null)); // CraftBukkit - Clear recipe when no recipe is found
         // CraftBukkit end
-        return recipe;
+        // YAPFA start
+    	if(c0.getCurrentRecipe() != null) {
+    		Optional<T> optional = recipes.a(c0.getCurrentRecipe(), world, c0);
+        	if(optional.isPresent()) {
+		        c0.setCurrentRecipe(optional.get());
+        		return optional;
+        	}
+    	}
+        for(IRecipe<C> rep : this.a(recipes)) {
+        	Optional<T> optional = recipes.a(rep, world, c0);
+        	if(optional.isPresent()) {
+		        c0.setCurrentRecipe(optional.get());
+        		return optional;
+        	}
+        }
+        c0.setCurrentRecipe(null); // CraftBukkit - Clear recipe when no recipe is found
+        return Optional.empty();
+        // YAPFA end
     }
 
     public <C extends IInventory, T extends IRecipe<C>> List<T> a(Recipes<T> recipes) {
diff --git a/src/main/java/net/minecraft/server/TileEntityFurnace.java b/src/main/java/net/minecraft/server/TileEntityFurnace.java
index 59aa2f8a7..7b1d20d39 100644
--- a/src/main/java/net/minecraft/server/TileEntityFurnace.java
+++ b/src/main/java/net/minecraft/server/TileEntityFurnace.java
@@ -99,7 +99,13 @@ public abstract class TileEntityFurnace extends TileEntityContainer implements I
         this.c = recipes;
     }
 
+    //YAPFA
+    private static Map<Item, Integer> cachedFuelMap = null;
+    
     public static Map<Item, Integer> f() {
+    	if(cachedFuelMap != null) {
+    		return cachedFuelMap; // YAPFA
+    	}
         Map<Item, Integer> map = Maps.newLinkedHashMap();
 
         a(map, (IMaterial) Items.LAVA_BUCKET, 20000);
@@ -162,6 +168,7 @@ public abstract class TileEntityFurnace extends TileEntityContainer implements I
         a(map, (IMaterial) Blocks.FLETCHING_TABLE, 300);
         a(map, (IMaterial) Blocks.SMITHING_TABLE, 300);
         a(map, (IMaterial) Blocks.COMPOSTER, 300);
+        cachedFuelMap = map; // YAPFA
         return map;
     }
 
@@ -613,4 +620,19 @@ public abstract class TileEntityFurnace extends TileEntityContainer implements I
         }
 
     }
+    
+     // YAPFA start
+    private IRecipe cachedRecipe = null;
+    @Override
+    public IRecipe getCurrentRecipe() {
+        return cachedRecipe;
+    }
+    @Override
+    public void setCurrentRecipe(IRecipe recipe) {
+    	cachedRecipe = recipe;
+    }
+
+    
+    // YAPFA end
+    
 }
-- 
2.25.1.windows.1