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Firstly, the old methods all routed to the CompletableFuture method. However, the CF method could not guarantee that if the caller was off-main that the future would be "completed" on-main. Since the callback methods used the CF one, this meant that the callback methods did not guarantee that the callbacks were to be called on the main thread. Now, all methods route to getChunkAtAsync(x, z, gen, urgent, cb) so that the methods with the callback are guaranteed to invoke the callback on the main thread. The CF behavior remains unchanged; it may still appear to complete on main if invoked off-main. Secondly, remove the scheduleOnMain invocation in the async chunk completion. This unnecessarily delays the callback by 1 tick. Thirdly, add getChunksAtAsync(minX, minZ, maxX, maxZ, ...) which will load chunks within an area. This method is provided as a helper as keeping all chunks loaded within an area can be complicated to implement for plugins (due to the lacking ticket API), and is already implemented internally anyways. Fourthly, remove the ticket addition that occured with getChunkAt and getChunkAtAsync. The ticket addition may delay the unloading of the chunk unnecessarily. It also fixes a very rare timing bug where the future/callback would be completed after the chunk unloads.
32 lines
1.7 KiB
Diff
32 lines
1.7 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: Sun, 20 Sep 2020 16:10:49 -0700
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Subject: [PATCH] Make sure inlined getChunkAt has inlined logic for loaded
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chunks
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Tux did some profiling some time ago and showed that the
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previous getChunkAt method which had inlined logic for loaded
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chunks did get inlined, but the standard CPS.getChunkAt
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method was not inlined.
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diff --git a/src/main/java/net/minecraft/world/level/Level.java b/src/main/java/net/minecraft/world/level/Level.java
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index 9536e127ff4d45ca59b74fe0f3dbde9a18c04f42..9afc0eaaca5ab7b6445d90ce53e31a6ae76f8848 100644
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--- a/src/main/java/net/minecraft/world/level/Level.java
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+++ b/src/main/java/net/minecraft/world/level/Level.java
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@@ -350,7 +350,14 @@ public abstract class Level implements LevelAccessor, AutoCloseable {
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@Override
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public final LevelChunk getChunk(int chunkX, int chunkZ) { // Paper - final to help inline
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- return (LevelChunk) this.getChunk(chunkX, chunkZ, ChunkStatus.FULL, true); // Paper - avoid a method jump
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+ // Paper start - Perf: make sure loaded chunks get the inlined variant of this function
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+ net.minecraft.server.level.ServerChunkCache cps = ((ServerLevel)this).getChunkSource();
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+ LevelChunk ifLoaded = cps.getChunkAtIfLoadedImmediately(chunkX, chunkZ);
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+ if (ifLoaded != null) {
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+ return ifLoaded;
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+ }
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+ return (LevelChunk) cps.getChunk(chunkX, chunkZ, ChunkStatus.FULL, true); // Paper - avoid a method jump
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+ // Paper end - Perf: make sure loaded chunks get the inlined variant of this function
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}
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// Paper start - if loaded
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