Paper/patches/server/0576-Cache-burn-durations.patch

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 627551db52a0ac1aff9f65f9fce7b9e3c07ad475..f1e44b57f8c77ee279b4be0853923dcd95f71f0a 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
@@ -124,7 +124,13 @@ 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> getFuel() {
+        // Paper start - cache burn durations
+        if(cachedBurnDurations != null) {
+            return cachedBurnDurations;
+        }
+        // Paper end
         Map<Item, Integer> map = Maps.newLinkedHashMap();
 
         AbstractFurnaceBlockEntity.add(map, (ItemLike) Items.LAVA_BUCKET, 20000);
@@ -189,7 +195,10 @@ public abstract class AbstractFurnaceBlockEntity extends BaseContainerBlockEntit
         AbstractFurnaceBlockEntity.add(map, (ItemLike) Blocks.COMPOSTER, 300);
         AbstractFurnaceBlockEntity.add(map, (ItemLike) Blocks.AZALEA, 100);
         AbstractFurnaceBlockEntity.add(map, (ItemLike) Blocks.FLOWERING_AZALEA, 100);
-        return map;
+        // Paper start - cache burn durations
+        cachedBurnDurations = com.google.common.collect.ImmutableMap.copyOf(map);
+        return cachedBurnDurations;
+        // Paper end
     }
 
     // CraftBukkit start - add fields and methods