From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: HaHaWTH <102713261+HaHaWTH@users.noreply.github.com>
Date: Tue, 9 Nov 2077 00:00:00 +0800
Subject: [PATCH] Fast BiomeManager seed obfuscation

Pretty tiny optimization, but better than nothing

diff --git a/net/minecraft/world/level/biome/BiomeManager.java b/net/minecraft/world/level/biome/BiomeManager.java
index b8a0fa20101fa3831e34494fd56690343ff8d57e..74cfd72d756c0b877adc27ad5b2d83e5240d3e75 100644
--- a/net/minecraft/world/level/biome/BiomeManager.java
+++ b/net/minecraft/world/level/biome/BiomeManager.java
@@ -34,9 +34,18 @@ public class BiomeManager {
         // Leaf end - cache getBiome
     }
 
+    // Leaf start - Replace SHA-256 with XXHash
+    private static final net.jpountz.xxhash.XXHash64 XXHASH = net.jpountz.xxhash.XXHashFactory.fastestInstance().hash64();
     public static long obfuscateSeed(long seed) {
-        return Hashing.sha256().hashLong(seed).asLong();
+        if (org.dreeam.leaf.config.modules.opt.FastBiomeManagerSeedObfuscation.enabled) {
+            java.nio.ByteBuffer buf = java.nio.ByteBuffer.allocate(8);
+            buf.putLong(0, seed);
+            return XXHASH.hash(buf, org.dreeam.leaf.config.modules.opt.FastBiomeManagerSeedObfuscation.seedObfuscationKey);
+        } else {
+            return Hashing.sha256().hashLong(seed).asLong();
+        }
     }
+    // Leaf end - Replace SHA-256 with XXHash
 
     public BiomeManager withDifferentSource(BiomeManager.NoiseBiomeSource newSource) {
         return new BiomeManager(newSource, this.biomeZoomSeed);