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994679a0c9
Tux pointed out the patch still has O(n^2) time complexity since the sublist class in arraylist does not override clear() from AbstractList, which uses a forward moving iterator to clear the list. Resolved by using a peek and poll from ArrayDeque. This patch also removes the useless WeakHashMap which holds the list (it mapped world->list) and replaces it with a field on World.
26 lines
1.0 KiB
Diff
26 lines
1.0 KiB
Diff
From 900048bc0a83882aa8c155c135a93c33851eba69 Mon Sep 17 00:00:00 2001
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From: Aikar <aikar@aikar.co>
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Date: Fri, 2 Dec 2016 00:11:43 -0500
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Subject: [PATCH] Optimize World.isLoaded(BlockPosition)Z
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Reduce method invocations for World.isLoaded(BlockPosition)Z
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diff --git a/src/main/java/net/minecraft/server/World.java b/src/main/java/net/minecraft/server/World.java
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index 3305e110c..8ac081bef 100644
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--- a/src/main/java/net/minecraft/server/World.java
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+++ b/src/main/java/net/minecraft/server/World.java
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@@ -209,6 +209,10 @@ public abstract class World implements IIBlockAccess, GeneratorAccess, AutoClose
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return i < 0 || i >= 256;
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}
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+ public boolean isLoaded(BlockPosition blockposition) {
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+ return getChunkIfLoaded(blockposition.getX() >> 4, blockposition.getZ() >> 4) != null; // Paper
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+ }
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+
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// Paper start
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public boolean isLoadedAndInBounds(BlockPosition blockposition) {
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return getWorldBorder().isInBounds(blockposition) && getChunkIfLoaded(blockposition.getX() >> 4, blockposition.getZ() >> 4) != null;
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--
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2.21.0
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