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
54 lines
2.3 KiB
Diff
54 lines
2.3 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Wyatt Childers <wchilders@nearce.com>
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Date: Sat, 4 Jul 2020 23:07:43 -0400
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Subject: [PATCH] Optimize the advancement data player iteration to be O(N)
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rather than O(N^2)
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diff --git a/src/main/java/net/minecraft/server/AdvancementDataPlayer.java b/src/main/java/net/minecraft/server/AdvancementDataPlayer.java
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index 57b9d13447a4f7804827c1bd41121c3069c696bd..d3387a4e16f81b820d40502d2c46ebb3db88f824 100644
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--- a/src/main/java/net/minecraft/server/AdvancementDataPlayer.java
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+++ b/src/main/java/net/minecraft/server/AdvancementDataPlayer.java
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@@ -439,6 +439,16 @@ public class AdvancementDataPlayer {
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}
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private void e(Advancement advancement) {
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+ // Paper start
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+ e(advancement, IterationEntryPoint.ROOT);
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+ }
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+ private enum IterationEntryPoint {
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+ ROOT,
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+ ITERATOR,
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+ PARENT_OF_ITERATOR
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+ }
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+ private void e(Advancement advancement, IterationEntryPoint entryPoint) {
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+ // Paper end
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boolean flag = this.f(advancement);
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boolean flag1 = this.h.contains(advancement);
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@@ -454,15 +464,23 @@ public class AdvancementDataPlayer {
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}
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if (flag != flag1 && advancement.b() != null) {
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- this.e(advancement.b());
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+ // Paper start - If we're not coming from an iterator consider this to be a root entry, otherwise
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+ // market that we're entering from the parent of an iterator.
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+ this.e(advancement.b(), entryPoint == IterationEntryPoint.ITERATOR ? IterationEntryPoint.PARENT_OF_ITERATOR : IterationEntryPoint.ROOT);
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}
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+ // If this is true, we've went through a child iteration, entered the parent, processed the parent
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+ // and are about to reprocess the children. Stop processing here to prevent O(N^2) processing.
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+ if (entryPoint == IterationEntryPoint.PARENT_OF_ITERATOR) {
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+ return;
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+ } // Paper end
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+
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Iterator iterator = advancement.e().iterator();
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while (iterator.hasNext()) {
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Advancement advancement1 = (Advancement) iterator.next();
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- this.e(advancement1);
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+ this.e(advancement1, IterationEntryPoint.ITERATOR); // Paper - Mark this call as being from iteration
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}
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}
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