From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: violetc <58360096+s-yh-china@users.noreply.github.com>
Date: Sun, 14 Aug 2022 08:17:28 +0800
Subject: [PATCH] Optimize entity coordinate key

This patch is Powered by Pufferfish(https://github.com/pufferfish-gg/Pufferfish)

diff --git a/src/main/java/io/papermc/paper/util/MCUtil.java b/src/main/java/io/papermc/paper/util/MCUtil.java
index 6efb8b10f17c70b05128039376d254e6beda3841..abbb75af4ffad5b82d8b785b4a747b06ef372f4d 100644
--- a/src/main/java/io/papermc/paper/util/MCUtil.java
+++ b/src/main/java/io/papermc/paper/util/MCUtil.java
@@ -210,7 +210,13 @@ public final class MCUtil {
     }
 
     public static long getCoordinateKey(final Entity entity) {
-        return ((long)(MCUtil.fastFloor(entity.getZ()) >> 4) << 32) | ((MCUtil.fastFloor(entity.getX()) >> 4) & 0xFFFFFFFFL);
+        // Leaves start - eliminate double -> long cast in hotpath
+        if (top.leavesmc.leaves.LeavesConfig.optimizeEntityCoordinateKey) {
+            return ((long)(entity.blockPosition.getZ() >> 4) << 32) | ((entity.blockPosition.getX() >> 4) & 0xFFFFFFFFL);
+        } else {
+            return ((long)(MCUtil.fastFloor(entity.getZ()) >> 4) << 32) | ((MCUtil.fastFloor(entity.getX()) >> 4) & 0xFFFFFFFFL);
+        }
+        // Leaves end - eliminate double -> long cast in hotpath
     }
 
     public static long getCoordinateKey(final ChunkPos pair) {
diff --git a/src/main/java/net/minecraft/world/entity/Entity.java b/src/main/java/net/minecraft/world/entity/Entity.java
index 43873929f11e373186190b3ae831dc68bfa69616..2433315c13e2da90f4f208d180d487c984a087ea 100644
--- a/src/main/java/net/minecraft/world/entity/Entity.java
+++ b/src/main/java/net/minecraft/world/entity/Entity.java
@@ -291,7 +291,7 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource {
     public double yo;
     public double zo;
     private Vec3 position;
-    private BlockPos blockPosition;
+    public BlockPos blockPosition; // Leaves - private -> public
     private ChunkPos chunkPosition;
     private Vec3 deltaMovement;
     private float yRot;
diff --git a/src/main/java/top/leavesmc/leaves/LeavesConfig.java b/src/main/java/top/leavesmc/leaves/LeavesConfig.java
index 78fdad3bd377da395be17efa1c20b30b427730cc..e80ab1fcd4d7a1a8b607ea17c4f4da8c6eb419b6 100644
--- a/src/main/java/top/leavesmc/leaves/LeavesConfig.java
+++ b/src/main/java/top/leavesmc/leaves/LeavesConfig.java
@@ -260,6 +260,12 @@ public final class LeavesConfig {
         fixPaper6045 = getBoolean("settings.performance.fix.fix-paper-6045", fixPaper6045);
     }
 
+    public static boolean optimizeEntityCoordinateKey = true;
+    private static void optimizeEntityCoordinateKey() {
+        optimizeEntityCoordinateKey = getBoolean("settings.performance.optimize-entity-coordinate-key", optimizeEntityCoordinateKey);
+    }
+
+
     public static final class WorldConfig {
 
         public final String worldName;