31 lines
1.6 KiB
Diff
31 lines
1.6 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Spottedleaf <Spottedleaf@users.noreply.github.com>
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Date: Thu, 11 Mar 2021 21:17:02 -0800
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Subject: [PATCH] Use hash table for maintaing changed block set
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When a lot of block changes occur the iteration for checking can
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add up a bit and cause a small performance impact.
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diff --git a/src/main/java/net/minecraft/server/level/ChunkHolder.java b/src/main/java/net/minecraft/server/level/ChunkHolder.java
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index de0c6316c9b75a2ecc7d6abf7bcca24e25de0ac0..4588ae8037407b81c99135863eb0c4e97c564c24 100644
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--- a/src/main/java/net/minecraft/server/level/ChunkHolder.java
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+++ b/src/main/java/net/minecraft/server/level/ChunkHolder.java
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@@ -41,6 +41,8 @@ import net.minecraft.world.level.lighting.LevelLightEngine;
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import net.minecraft.server.MinecraftServer;
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// CraftBukkit end
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+import it.unimi.dsi.fastutil.shorts.ShortOpenHashSet; // Paper
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+
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public class ChunkHolder {
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public static final Either<ChunkAccess, ChunkHolder.ChunkLoadingFailure> UNLOADED_CHUNK = Either.right(ChunkHolder.ChunkLoadingFailure.UNLOADED);
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@@ -390,7 +392,7 @@ public class ChunkHolder {
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if (i < 0 || i >= this.changedBlocksPerSection.length) return; // CraftBukkit - SPIGOT-6086, SPIGOT-6296
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if (this.changedBlocksPerSection[i] == null) {
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this.hasChangedSections = true;
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- this.changedBlocksPerSection[i] = new ShortArraySet();
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+ this.changedBlocksPerSection[i] = new ShortOpenHashSet(); // Paper - use a set to make setting constant-time
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}
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this.changedBlocksPerSection[i].add(SectionPos.sectionRelativePos(pos));
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