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 02d6c98b7a2212b13ffd9859ebfdc0a8357ebe65..8add631c0614879d24455a96d94bc6711456f223 100644
--- a/src/main/java/io/papermc/paper/util/MCUtil.java
+++ b/src/main/java/io/papermc/paper/util/MCUtil.java
@@ -199,7 +199,13 @@ 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 (org.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 2dc27d27908a50101e5671809d1331db0cb2a96c..9e984f4bad722244d70d8b45755ca3abd0a22d4a 100644
--- a/src/main/java/net/minecraft/world/entity/Entity.java
+++ b/src/main/java/net/minecraft/world/entity/Entity.java
@@ -316,7 +316,7 @@ public abstract class Entity implements SyncedDataHolder, Nameable, EntityAccess
     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;