PaperMC/patches/server/0495-Improve-inlinig-for-some-hot-IBlockData-methods.patch
Spottedleaf 01a13871de
Rewrite chunk system (#8177)
Patch documentation to come

Issues with the old system that are fixed now:
- World generation does not scale with cpu cores effectively.
- Relies on the main thread for scheduling and maintaining chunk state, dropping chunk load/generate rates at lower tps.
- Unreliable prioritisation of chunk gen/load calls that block the main thread.
- Shutdown logic is utterly unreliable, as it has to wait for all chunks to unload - is it guaranteed that the chunk system is in a state on shutdown that it can reliably do this? Watchdog shutdown also typically failed due to thread checks, which is now resolved.
- Saving of data is not unified (i.e can save chunk data without saving entity data, poses problems for desync if shutdown is really abnormal.
- Entities are not loaded with chunks. This caused quite a bit of headache for Chunk#getEntities API, but now the new chunk system loads entities with chunks so that they are ready whenever the chunk loads in. Effectively brings the behavior back to 1.16 era, but still storing entities in their own separate regionfiles.

The above list is not complete. The patch documentation will complete it.

New chunk system hard relies on starlight and dataconverter, and most importantly the new concurrent utilities in ConcurrentUtil.

Some of the old async chunk i/o interface (i.e the old file io thread reroutes _some_ calls to the new file io thread) is kept for plugin compat reasons. It will be removed in the next major version of minecraft.

The old legacy chunk system patches have been moved to the removed folder in case we need them again.
2022-09-26 01:02:51 -07:00

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Spottedleaf <Spottedleaf@users.noreply.github.com>
Date: Mon, 6 Jul 2020 20:46:50 -0700
Subject: [PATCH] Improve inlinig for some hot IBlockData methods
diff --git a/src/main/java/net/minecraft/world/level/block/state/BlockBehaviour.java b/src/main/java/net/minecraft/world/level/block/state/BlockBehaviour.java
index 97b0e820d353e8ab4ca9d9e2efd0a8819119b2ab..bfcd61e09a307e99d6f2e7edae33a0a069abcb51 100644
--- a/src/main/java/net/minecraft/world/level/block/state/BlockBehaviour.java
+++ b/src/main/java/net/minecraft/world/level/block/state/BlockBehaviour.java
@@ -730,8 +730,14 @@ public abstract class BlockBehaviour {
return this.conditionallyFullOpaque;
}
// Paper end - starlight
+ // Paper start
+ protected boolean isTicking;
+ protected FluidState fluid;
+ // Paper end
public void initCache() {
+ this.fluid = this.getBlock().getFluidState(this.asState()); // Paper - moved from getFluid()
+ this.isTicking = this.getBlock().isRandomlyTicking(this.asState()); // Paper - moved from isTicking()
if (!this.getBlock().hasDynamicShape()) {
this.cache = new BlockBehaviour.BlockStateBase.Cache(this.asState());
}
@@ -782,15 +788,15 @@ public abstract class BlockBehaviour {
return this.shapeExceedsCube; // Paper - moved into shape cache init
}
- public boolean useShapeForLightOcclusion() {
+ public final boolean useShapeForLightOcclusion() { // Paper
return this.useShapeForLightOcclusion;
}
- public int getLightEmission() {
+ public final int getLightEmission() { // Paper
return this.lightEmission;
}
- public boolean isAir() {
+ public final boolean isAir() { // Paper
return this.isAir;
}
@@ -864,7 +870,7 @@ public abstract class BlockBehaviour {
}
}
- public boolean canOcclude() {
+ public final boolean canOcclude() { // Paper
return this.canOcclude;
}
@@ -1062,12 +1068,12 @@ public abstract class BlockBehaviour {
return this.getBlock() == block;
}
- public FluidState getFluidState() {
- return this.getBlock().getFluidState(this.asState());
+ public final FluidState getFluidState() { // Paper
+ return this.fluid; // Paper - moved into init
}
- public boolean isRandomlyTicking() {
- return this.getBlock().isRandomlyTicking(this.asState());
+ public final boolean isRandomlyTicking() { // Paper
+ return this.isTicking; // Paper - moved into init
}
public long getSeed(BlockPos pos) {
diff --git a/src/main/java/net/minecraft/world/level/material/FluidState.java b/src/main/java/net/minecraft/world/level/material/FluidState.java
index d035eaccc09dfeaedf25579b850ccdaecba3f974..66f712657ae0c4166ecd198f41081d96843296c4 100644
--- a/src/main/java/net/minecraft/world/level/material/FluidState.java
+++ b/src/main/java/net/minecraft/world/level/material/FluidState.java
@@ -26,8 +26,12 @@ public final class FluidState extends StateHolder<Fluid, FluidState> {
public static final int AMOUNT_MAX = 9;
public static final int AMOUNT_FULL = 8;
+ // Paper start
+ protected final boolean isEmpty;
+ // Paper end
public FluidState(Fluid fluid, ImmutableMap<Property<?>, Comparable<?>> propertiesMap, MapCodec<FluidState> codec) {
super(fluid, propertiesMap, codec);
+ this.isEmpty = fluid.isEmpty(); // Paper - moved from isEmpty()
}
public Fluid getType() {
@@ -43,7 +47,7 @@ public final class FluidState extends StateHolder<Fluid, FluidState> {
}
public boolean isEmpty() {
- return this.getType().isEmpty();
+ return this.isEmpty; // Paper - moved into constructor
}
public float getHeight(BlockGetter world, BlockPos pos) {