From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: hayanesuru <hayanesuru@outlook.jp>
Date: Tue, 3 Jun 2025 15:20:59 +0900
Subject: [PATCH] optimize mob spawning


diff --git a/net/minecraft/world/level/NaturalSpawner.java b/net/minecraft/world/level/NaturalSpawner.java
index f242941ce06d356a025e306efe78c688e9b755c4..38a6a11c05c0a0a2f59c1477e516431263dce101 100644
--- a/net/minecraft/world/level/NaturalSpawner.java
+++ b/net/minecraft/world/level/NaturalSpawner.java
@@ -472,6 +472,17 @@ public final class NaturalSpawner {
         }
     }
 
+    // Leaf start - optimize mob spawning
+    private static void mutableRandomPosWithin(BlockPos.MutableBlockPos pos1, Level level, LevelChunk chunk) {
+        ChunkPos pos = chunk.getPos();
+        int randomX = pos.getMinBlockX() + level.random.nextInt(16);
+        int randomZ = pos.getMinBlockZ() + level.random.nextInt(16);
+        int surfaceY = chunk.getHeight(Heightmap.Types.WORLD_SURFACE, randomX, randomZ) + 1;
+        int randomY = Mth.randomBetweenInclusive(level.random, level.getMinY(), surfaceY);
+        pos1.set(randomX, randomY, randomZ);
+    }
+    // Leaf end - optimize mob spawning
+
     private static BlockPos getRandomPosWithin(Level level, LevelChunk chunk) {
         ChunkPos pos = chunk.getPos();
         int i = pos.getMinBlockX() + level.random.nextInt(16);