e886d8118e
Upstream has released updates that appear to apply and compile correctly. This update has not been tested by PaperMC and as with ANY update, please do your own testing
73 Zeilen
4.0 KiB
Diff
73 Zeilen
4.0 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: SuperCoder7979 <25208576+SuperCoder7979@users.noreply.github.com>
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Date: Tue, 3 Nov 2020 23:48:05 -0600
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Subject: [PATCH] Significantly improve performance of the end generation
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This patch implements a noise cache for the end which significantly reduces the computation time of generation. This results in about a 3x improvement.
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Original code by SuperCoder7979 and Gegy in Lithium, licensed under LGPL-3.0 (Source: https://github.com/jellysquid3/lithium-fabric)
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Co-authored-by: Gegy <gegy1000@gmail.com>
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Co-authored-by: Dylan Xaldin <Puremin0rez515@gmail.com>
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Co-authored-by: pop4959 <pop4959@gmail.com>
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diff --git a/src/main/java/net/minecraft/server/WorldChunkManagerTheEnd.java b/src/main/java/net/minecraft/server/WorldChunkManagerTheEnd.java
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index 9c15cd303ccc2928be4e3e7080e74e8314d7e0f2..70924c2942f6cc668eb4d11afdb42a966bd5edc8 100644
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--- a/src/main/java/net/minecraft/server/WorldChunkManagerTheEnd.java
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+++ b/src/main/java/net/minecraft/server/WorldChunkManagerTheEnd.java
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@@ -3,6 +3,7 @@ package net.minecraft.server;
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import com.google.common.collect.ImmutableList;
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import com.mojang.serialization.Codec;
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import com.mojang.serialization.codecs.RecordCodecBuilder;
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+import it.unimi.dsi.fastutil.HashCommon; // Paper
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import java.util.List;
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public class WorldChunkManagerTheEnd extends WorldChunkManager {
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@@ -22,6 +23,16 @@ public class WorldChunkManagerTheEnd extends WorldChunkManager {
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private final BiomeBase k;
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private final BiomeBase l;
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private final BiomeBase m;
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+ // Paper start
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+ private static final class NoiseCache {
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+ public long[] keys = new long[8192];
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+ public float[] values = new float[8192];
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+ public NoiseCache() {
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+ java.util.Arrays.fill(keys, Long.MIN_VALUE);
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+ }
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+ }
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+ private static final ThreadLocal<java.util.Map<NoiseGenerator3Handler, NoiseCache>> noiseCache = ThreadLocal.withInitial(java.util.WeakHashMap::new);
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+ // Paper end
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public WorldChunkManagerTheEnd(IRegistry<BiomeBase> iregistry, long i) {
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this(iregistry, i, (BiomeBase) iregistry.d(Biomes.THE_END), (BiomeBase) iregistry.d(Biomes.END_HIGHLANDS), (BiomeBase) iregistry.d(Biomes.END_MIDLANDS), (BiomeBase) iregistry.d(Biomes.SMALL_END_ISLANDS), (BiomeBase) iregistry.d(Biomes.END_BARRENS));
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@@ -76,13 +87,27 @@ public class WorldChunkManagerTheEnd extends WorldChunkManager {
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f = MathHelper.a(f, -100.0F, 80.0F);
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+ NoiseCache cache = noiseCache.get().computeIfAbsent(noisegenerator3handler, m -> new NoiseCache()); // Paper
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for (int k1 = -12; k1 <= 12; ++k1) {
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for (int l1 = -12; l1 <= 12; ++l1) {
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long i2 = (long) (k + k1);
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long j2 = (long) (l + l1);
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- if (i2 * i2 + j2 * j2 > 4096L && noisegenerator3handler.a((double) i2, (double) j2) < -0.8999999761581421D) {
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- float f1 = (MathHelper.e((float) i2) * 3439.0F + MathHelper.e((float) j2) * 147.0F) % 13.0F + 9.0F;
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+ // Paper start - Significantly improve end generation performance by using a noise cache
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+ long key = ChunkCoordIntPair.pair((int) i2, (int) j2);
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+ int index = (int) HashCommon.mix(key) & 8191;
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+ float f1 = Float.MIN_VALUE;
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+ if (cache.keys[index] == key) {
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+ f1 = cache.values[index];
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+ } else {
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+ if (i2 * i2 + j2 * j2 > 4096L && noisegenerator3handler.a((double) i2, (double) j2) < -0.8999999761581421D) {
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+ f1 = (MathHelper.e((float) i2) * 3439.0F + MathHelper.e((float) j2) * 147.0F) % 13.0F + 9.0F;
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+ }
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+ cache.keys[index] = key;
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+ cache.values[index] = f1;
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+ }
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+ if (f1 != Float.MIN_VALUE) {
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+ // Paper end
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float f2 = (float) (i1 - k1 * 2);
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float f3 = (float) (j1 - l1 * 2);
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float f4 = 100.0F - MathHelper.c(f2 * f2 + f3 * f3) * f1;
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