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9a4efaa230
Originally vanilla logic is to use stream, and Mojang switched it to Guava's Collections2 since 1.21.4. It is much faster than using stream or manually adding to a new ArrayList. Manually adding to a new ArrayList requires allocating a new object array. However, the Collections2 lazy handles filter condition on iteration, so much better.
32 lines
1.6 KiB
Diff
32 lines
1.6 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: HaHaWTH <102713261+HaHaWTH@users.noreply.github.com>
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Date: Tue, 9 Nov 2077 00:00:00 +0800
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Subject: [PATCH] Fast BiomeManager seed obfuscation
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Pretty tiny optimization, but better than nothing
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diff --git a/net/minecraft/world/level/biome/BiomeManager.java b/net/minecraft/world/level/biome/BiomeManager.java
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index b8a0fa20101fa3831e34494fd56690343ff8d57e..74cfd72d756c0b877adc27ad5b2d83e5240d3e75 100644
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--- a/net/minecraft/world/level/biome/BiomeManager.java
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+++ b/net/minecraft/world/level/biome/BiomeManager.java
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@@ -34,9 +34,18 @@ public class BiomeManager {
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// Leaf end - cache getBiome
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}
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+ // Leaf start - Replace SHA-256 with XXHash
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+ private static final net.jpountz.xxhash.XXHash64 XXHASH = net.jpountz.xxhash.XXHashFactory.fastestInstance().hash64();
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public static long obfuscateSeed(long seed) {
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- return Hashing.sha256().hashLong(seed).asLong();
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+ if (org.dreeam.leaf.config.modules.opt.FastBiomeManagerSeedObfuscation.enabled) {
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+ java.nio.ByteBuffer buf = java.nio.ByteBuffer.allocate(8);
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+ buf.putLong(0, seed);
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+ return XXHASH.hash(buf, org.dreeam.leaf.config.modules.opt.FastBiomeManagerSeedObfuscation.seedObfuscationKey);
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+ } else {
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+ return Hashing.sha256().hashLong(seed).asLong();
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+ }
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}
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+ // Leaf end - Replace SHA-256 with XXHash
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public BiomeManager withDifferentSource(BiomeManager.NoiseBiomeSource newSource) {
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return new BiomeManager(newSource, this.biomeZoomSeed);
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