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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: miclebrick <miclebrick@outlook.com>
Date: Thu, 6 Dec 2018 19:52:50 -0500
Subject: [PATCH] Cache block data strings


diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
index 07dd48fd300ac72edfa768632287c49ecf57fa75..604646affe004fce68a61640326fdaefeae72802 100644
--- a/src/main/java/net/minecraft/server/MinecraftServer.java
+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
@@ -1953,6 +1953,7 @@ public abstract class MinecraftServer extends IAsyncTaskHandlerReentrant<TickTas
             this.getPlayerList().reload();
             this.customFunctionData.a(this.dataPackResources.a());
             this.ak.a(this.dataPackResources.h());
+            org.bukkit.craftbukkit.block.data.CraftBlockData.reloadCache(); // Paper - cache block data strings, they can be defined by datapacks so refresh it here
         }, this);
 
         if (this.isMainThread()) {
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 ed88da727feddc319a650fb35710d16727f6dbd7..58f892478de74b853cd35ef2fec8c462e3a9ecee 100644
--- a/src/main/java/org/bukkit/craftbukkit/block/data/CraftBlockData.java
+++ b/src/main/java/org/bukkit/craftbukkit/block/data/CraftBlockData.java
@@ -13,6 +13,7 @@ import net.minecraft.commands.arguments.blocks.ArgumentBlock;
 import net.minecraft.core.EnumDirection;
 import net.minecraft.core.IRegistry;
 import net.minecraft.nbt.NBTTagCompound;
+import net.minecraft.resources.MinecraftKey;
 import net.minecraft.util.INamable;
 import net.minecraft.world.level.block.Block;
 import net.minecraft.world.level.block.state.IBlockData;
@@ -476,9 +477,39 @@ public class CraftBlockData implements BlockData {
         Preconditions.checkState(MAP.put(nms, bukkit) == null, "Duplicate mapping %s->%s", nms, bukkit);
     }
 
+    // Paper start - cache block data strings
+    private static Map<String, CraftBlockData> stringDataCache = new HashMap<>();
+
+    static {
+        // cache all of the default states at startup, will not cache ones with the custom states inside of the
+        // brackets in a different order, though
+        reloadCache();
+    }
+
+    public static void reloadCache() {
+        stringDataCache.clear();
+        Block.REGISTRY_ID.forEach(blockData -> stringDataCache.put(blockData.toString(), blockData.createCraftBlockData()));
+    }
+    // Paper end
+
     public static CraftBlockData newData(Material material, String data) {
         Preconditions.checkArgument(material == null || material.isBlock(), "Cannot get data for not block %s", material);
 
+        // Paper start - cache block data strings
+        if (material != null) {
+            Block block = CraftMagicNumbers.getBlock(material);
+            if (block != null) {
+                MinecraftKey key = IRegistry.BLOCK.getKey(block);
+                data = data == null ? key.toString() : key + data;
+            }
+        }
+
+        CraftBlockData cached = stringDataCache.computeIfAbsent(data, s -> createNewData(null, s));
+        return (CraftBlockData) cached.clone();
+    }
+
+    private static CraftBlockData createNewData(Material material, String data) {
+        // Paper end - cache block data strings
         IBlockData blockData;
         Block block = CraftMagicNumbers.getBlock(material);
         Map<IBlockState<?>, Comparable<?>> parsed = null;