65 lines
3.8 KiB
Diff
65 lines
3.8 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Paul Sauve <paul@technove.co>
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Date: Thu, 4 Feb 2021 23:28:46 -0600
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Subject: [PATCH] Cache palette array
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Instead of allocating the 4KB for every chunk section, cache it locally and
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reuse it for other chunk sections to save on allocations. These allocations add
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up very quickly when saving chunks frequently.
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1.18: PalettedContainer changed, mojang introduced a Codec into the mix to make things
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more complicated. Needs a complete rework, but probably still viable as a perf improvement.
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diff --git a/src/main/java/net/minecraft/world/level/chunk/PalettedContainer.java b/src/main/java/net/minecraft/world/level/chunk/PalettedContainer.java
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index c9e942669458668a184aaec3bc0a5509dd6ab5f0..ac84d49d7819666a89cacbe9ef1199cf22ac2ac3 100644
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--- a/src/main/java/net/minecraft/world/level/chunk/PalettedContainer.java
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+++ b/src/main/java/net/minecraft/world/level/chunk/PalettedContainer.java
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@@ -263,13 +263,17 @@ public class PalettedContainer<T> implements PaletteResize<T> {
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}
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+ // Paper start - allow reusing int array
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public synchronized void write(CompoundTag nbt, String paletteKey, String dataKey) { // Paper - synchronize
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+ this.write(nbt, paletteKey, dataKey, new int[4096]);
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+ }
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+ public synchronized void write(CompoundTag nbt, String paletteKey, String dataKey, int[] is) { // Paper - synchronize // Paper end
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try {
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this.acquire();
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HashMapPalette<T> hashMapPalette = new HashMapPalette<>(this.registry, this.bits, this.dummyPaletteResize, this.reader, this.writer);
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T object = this.defaultValue;
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int i = hashMapPalette.idFor(this.defaultValue);
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- int[] is = new int[4096];
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+ //int[] is = new int[4096]; // Paper - will now be pulled from ThreadLocal
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for(int j = 0; j < 4096; ++j) {
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T object2 = this.get(j);
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diff --git a/src/main/java/net/minecraft/world/level/chunk/storage/ChunkSerializer.java b/src/main/java/net/minecraft/world/level/chunk/storage/ChunkSerializer.java
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index 7921ee2786d0d6a60d43786b20efc03a0f9178e3..10f15b8c7763a980aec47a4b4dda5686e60642ce 100644
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--- a/src/main/java/net/minecraft/world/level/chunk/storage/ChunkSerializer.java
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+++ b/src/main/java/net/minecraft/world/level/chunk/storage/ChunkSerializer.java
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@@ -500,6 +500,7 @@ public class ChunkSerializer {
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return new AsyncSaveData(blockLight, skyLight, blockTickListSerialized, fluidTickListSerialized, blockEntitiesSerialized, world.getGameTime());
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}
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+ private static final ThreadLocal<int[]> PALETTE_ARRAY = ThreadLocal.withInitial(() -> new int[4096]); // Paper - maintain a per-thread cache for saving palettes
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public static CompoundTag write(ServerLevel world, ChunkAccess chunk) {
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return saveChunk(world, chunk, null);
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}
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@@ -533,6 +534,7 @@ public class ChunkSerializer {
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ThreadedLevelLightEngine lightenginethreaded = world.getChunkSource().getLightEngine();
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boolean flag = chunk.isLightCorrect();
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+ int[] is = PALETTE_ARRAY.get(); // Paper - use cached
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for (int i = lightenginethreaded.getMinLightSection(); i < lightenginethreaded.getMaxLightSection(); ++i) {
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int finalI = i; // CraftBukkit - decompile errors
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LevelChunkSection chunksection = (LevelChunkSection) Arrays.stream(achunksection).filter((chunksection1) -> {
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@@ -547,7 +549,7 @@ public class ChunkSerializer {
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nbttagcompound2.putByte("Y", (byte) (i & 255));
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if (chunksection != LevelChunk.EMPTY_SECTION) {
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- chunksection.getStates().write(nbttagcompound2, "Palette", "BlockStates");
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+ chunksection.getStates().write(nbttagcompound2, "Palette", "BlockStates", is); // Paper - reuse array
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}
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// Paper start - replace light engine
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