1 files changed, 49 insertions, 0 deletions
diff --git a/patches/server/0237-Optimize-CraftBlockData-Creation.patch b/patches/server/0237-Optimize-CraftBlockData-Creation.patch
new file mode 100644
index 0000000000..990b35be96
--- /dev/null
+++ b/patches/server/0237-Optimize-CraftBlockData-Creation.patch
@@ -0,0 +1,49 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: miclebrick <[email protected]>
+Date: Thu, 23 Aug 2018 11:45:32 -0400
+Subject: [PATCH] Optimize CraftBlockData Creation
+
+Avoids a hashmap lookup by cacheing a reference to the CraftBlockData
+and cloning it when one is needed.
+
+diff --git a/src/main/java/net/minecraft/world/level/block/state/BlockBehaviour.java b/src/main/java/net/minecraft/world/level/block/state/BlockBehaviour.java
+index e8815210405152696a9f7ddae64f87ff456fa9bd..3e76f1baa321f1c2551a027a705bbeed48936e2b 100644
+--- a/src/main/java/net/minecraft/world/level/block/state/BlockBehaviour.java
++++ b/src/main/java/net/minecraft/world/level/block/state/BlockBehaviour.java
+@@ -807,6 +807,14 @@ public abstract class BlockBehaviour implements FeatureElement {
+             this.instrument = blockbase_info.instrument;
+             this.replaceable = blockbase_info.replaceable;
+         }
++        // Paper start - Perf: impl cached craft block data, lazy load to fix issue with loading at the wrong time
++        private org.bukkit.craftbukkit.block.data.CraftBlockData cachedCraftBlockData;
++
++        public org.bukkit.craftbukkit.block.data.CraftBlockData createCraftBlockData() {
++            if (cachedCraftBlockData == null) cachedCraftBlockData = org.bukkit.craftbukkit.block.data.CraftBlockData.createData(asState());
++            return (org.bukkit.craftbukkit.block.data.CraftBlockData) cachedCraftBlockData.clone();
++        }
++        // Paper end - Perf: impl cached craft block data, lazy load to fix issue with loading at the wrong time
+ 
+         private boolean calculateSolid() {
+             if (((Block) this.owner).properties.forceSolidOn) {
+diff --git a/src/main/java/org/bukkit/craftbukkit/block/data/CraftBlockData.java b/src/main/java/org/bukkit/craftbukkit/block/data/CraftBlockData.java
+index 6ff5da6fac47f5eb6e574665110c0f2649b842d3..c1c5750dd2e4a9af1a115996a87eaaa1ea552c74 100644
+--- a/src/main/java/org/bukkit/craftbukkit/block/data/CraftBlockData.java
++++ b/src/main/java/org/bukkit/craftbukkit/block/data/CraftBlockData.java
+@@ -570,7 +570,17 @@ public class CraftBlockData implements BlockData {
+         return craft;
+     }
+ 
++    // Paper start - optimize creating BlockData to not need a map lookup
++    static {
++        // Initialize cached data for all IBlockData instances after registration
++        Block.BLOCK_STATE_REGISTRY.iterator().forEachRemaining(net.minecraft.world.level.block.state.BlockState::createCraftBlockData);
++    }
+     public static CraftBlockData fromData(net.minecraft.world.level.block.state.BlockState data) {
++        return data.createCraftBlockData();
++    }
++
++    public static CraftBlockData createData(net.minecraft.world.level.block.state.BlockState data) {
++        // Paper end
+         return CraftBlockData.MAP.getOrDefault(data.getBlock().getClass(), CraftBlockData::new).apply(data);
+     }
+