PaperMC/patches/server/0961-Optimise-recalcBlockCounts-for-empty-sections.patch
Nassim Jahnke 275173e538
Updated Upstream (Bukkit/CraftBukkit)
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

Bukkit Changes:
0c5d8709 SPIGOT-7400: Downgrade maven-resolver due to issues resolving certain depends
255c4fdb SPIGOT-7380: Add PlayerInteractEvent#getClickedPosition and ChiseledBookshelf#getSlot

CraftBukkit Changes:
b6b514b7e SPIGOT-7400: Downgrade maven-resolver due to issues resolving certain depends
fcff84de9 SPIGOT-7399: Revert null check in CraftMetaItem#safelyAdd
44a4b5649 SPIGOT-7380: Add PlayerInteractEvent#getClickedPosition and ChiseledBookshelf#getSlot
676969d01 SPIGOT-7389: Handle setting null items in ChiseledBookshelf Inventory
2023-06-18 13:18:11 +02:00

37 lines
1.9 KiB
Diff

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Spottedleaf <Spottedleaf@users.noreply.github.com>
Date: Mon, 15 May 2023 20:25:26 -0700
Subject: [PATCH] Optimise recalcBlockCounts() for empty sections
In 1.18, every chunk section is initialised to a non-null value
and recalcBlockCounts() is invoked for each section.
However, in a standard world, most sections are empty. In such cases,
recalcBlockCounts() would iterate over ever position - even though
the block data would all be air. To avoid this, we skip
searching the section unless the palette indicates there _could_ be
a non-air block state or non-empty fluid state.
Chunk loading initially showed that recalcBlockCounts() over
sections with a ZeroBitStorage data to to take ~20% of the process,
now it takes <1%.
diff --git a/src/main/java/net/minecraft/world/level/chunk/LevelChunkSection.java b/src/main/java/net/minecraft/world/level/chunk/LevelChunkSection.java
index 7a57a75db00cd64e4c95740b575277a1f355e414..d4477b0dda6a1ef7bd8323c0d11b636bd071d18e 100644
--- a/src/main/java/net/minecraft/world/level/chunk/LevelChunkSection.java
+++ b/src/main/java/net/minecraft/world/level/chunk/LevelChunkSection.java
@@ -232,6 +232,7 @@ public class LevelChunkSection {
this.nonEmptyBlockCount = 0;
this.tickingBlockCount = 0;
this.tickingFluidCount = 0;
+ if (this.maybeHas((BlockState state) -> !state.isAir() || !state.getFluidState().isEmpty())) { // Paper - do not run forEachLocation on clearly empty sections
this.states.forEachLocation((BlockState iblockdata, int i) -> {
FluidState fluid = iblockdata.getFluidState();
@@ -251,6 +252,7 @@ public class LevelChunkSection {
}
});
+ } // Paper - do not run forEachLocation on clearly empty sections
// Paper end
this.initBlockCollisionData(); // Paper
}