From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: lukas <lukasalt98@gmail.com>
Date: Sun, 27 Dec 2020 16:47:00 +0100
Subject: [PATCH] Cache burn durations


diff --git a/src/main/java/net/minecraft/world/level/block/entity/AbstractFurnaceBlockEntity.java b/src/main/java/net/minecraft/world/level/block/entity/AbstractFurnaceBlockEntity.java
index 4126a36dbc7750108a883f0be14dcb0d2e6d7ae8..f47b46cebd43faa509b8139d2a51cc8f87615893 100644
--- a/src/main/java/net/minecraft/world/level/block/entity/AbstractFurnaceBlockEntity.java
+++ b/src/main/java/net/minecraft/world/level/block/entity/AbstractFurnaceBlockEntity.java
@@ -1,5 +1,6 @@
 package net.minecraft.world.level.block.entity;
 
+import com.google.common.collect.ImmutableMap;
 import com.google.common.collect.Lists;
 import com.google.common.collect.Maps;
 import it.unimi.dsi.fastutil.objects.Object2IntMap.Entry;
@@ -111,7 +112,15 @@ public abstract class AbstractFurnaceBlockEntity extends BaseContainerBlockEntit
         this.recipeType = recipeType;
     }
 
+    private static Map<Item, Integer> cachedBurnDurations = null; // Paper - cache burn durations
+
+    public static Map<Item, Integer> getBurnDurations() { return getFuel(); } // Paper - OBFHELPER
     public static Map<Item, Integer> getFuel() {
+        // Paper start - cache burn durations
+        if(cachedBurnDurations != null) {
+            return cachedBurnDurations;
+        }
+        // Paper end
         Map<Item, Integer> map = Maps.newLinkedHashMap();
 
         add(map, (ItemLike) Items.LAVA_BUCKET, 20000);
@@ -174,7 +183,10 @@ public abstract class AbstractFurnaceBlockEntity extends BaseContainerBlockEntit
         add(map, (ItemLike) Blocks.FLETCHING_TABLE, 300);
         add(map, (ItemLike) Blocks.SMITHING_TABLE, 300);
         add(map, (ItemLike) Blocks.COMPOSTER, 300);
-        return map;
+        // Paper start - cache burn durations
+        cachedBurnDurations = ImmutableMap.copyOf(map);
+        return cachedBurnDurations;
+        // Paper end
     }
 
     // CraftBukkit start - add fields and methods
@@ -428,7 +440,7 @@ public abstract class AbstractFurnaceBlockEntity extends BaseContainerBlockEntit
         } else {
             Item item = fuel.getItem();
 
-            return (Integer) getFuel().getOrDefault(item, 0);
+            return getBurnDurations().getOrDefault(item, 0); // Paper - cache burn durations
         }
     }
 
@@ -441,7 +453,7 @@ public abstract class AbstractFurnaceBlockEntity extends BaseContainerBlockEntit
     // Paper end
 
     public static boolean isFuel(ItemStack stack) {
-        return getFuel().containsKey(stack.getItem());
+        return getBurnDurations().containsKey(stack.getItem()); // Paper - cache burn durations
     }
 
     @Override