PaperMC/patches/server/0418-Optimise-getType-calls.patch
Bjarne Koll c5a10665b8
Remove wall-time / unused skip tick protection (#11412)
Spigot still maintains some partial implementation of "tick skipping", a
practice in which the MinecraftServer.currentTick field is updated not
by an increment of one per actual tick, but instead set to
System.currentTimeMillis() / 50. This behaviour means that the tracked
tick may "skip" a tick value in case a previous tick took more than the
expected 50ms.

To compensate for this in important paths, spigot/craftbukkit
implements "wall-time". Instead of incrementing/decrementing ticks on
block entities/entities by one for each call to their tick() method,
they instead increment/decrement important values, like
an ItemEntity's age or pickupDelay, by the difference of
`currentTick - lastTick`, where `lastTick` is the value of
`currentTick` during the last tick() call.

These "fixes" however do not play nicely with minecraft's simulation
distance as entities/block entities implementing the above behaviour
would "catch up" their values when moving from a non-ticking chunk to a
ticking one as their `lastTick` value remains stuck on the last tick in
a ticking chunk and hence lead to a large "catch up" once ticked again.

Paper completely removes the "tick skipping" behaviour (See patch
"Further-improve-server-tick-loop"), making the above precautions
completely unnecessary, which also rids paper of the previous described
incompatibility with non-ticking chunks.
2024-09-19 16:36:07 +02:00

93 lines
5.2 KiB
Diff

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Spottedleaf <Spottedleaf@users.noreply.github.com>
Date: Wed, 3 Jun 2020 11:37:13 -0700
Subject: [PATCH] Optimise getType calls
Remove the map lookup for converting from Block->Bukkit Material
diff --git a/src/main/java/net/minecraft/world/level/block/state/BlockState.java b/src/main/java/net/minecraft/world/level/block/state/BlockState.java
index 065d140ca4f987e14138a37f4c7d60879dd7b6e1..601135f3368272bf1ca3a43ec9c199e3ee838462 100644
--- a/src/main/java/net/minecraft/world/level/block/state/BlockState.java
+++ b/src/main/java/net/minecraft/world/level/block/state/BlockState.java
@@ -10,6 +10,16 @@ import net.minecraft.world.level.block.state.properties.Property;
public class BlockState extends BlockBehaviour.BlockStateBase {
public static final Codec<BlockState> CODEC = codec(BuiltInRegistries.BLOCK.byNameCodec(), Block::defaultBlockState).stable();
+ // Paper start - optimise getType calls
+ org.bukkit.Material cachedMaterial;
+
+ public final org.bukkit.Material getBukkitMaterial() {
+ if (this.cachedMaterial == null) {
+ this.cachedMaterial = org.bukkit.craftbukkit.block.CraftBlockType.minecraftToBukkit(this.getBlock());
+ }
+ return this.cachedMaterial;
+ }
+ // Paper end - optimise getType calls
public BlockState(Block block, Reference2ObjectArrayMap<Property<?>, Comparable<?>> propertyMap, MapCodec<BlockState> codec) {
super(block, propertyMap, codec);
}
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftChunkSnapshot.java b/src/main/java/org/bukkit/craftbukkit/CraftChunkSnapshot.java
index f2ce97e46cdbda0f8960eed9b601c797d8eaef48..85029f1acfdbb411d9ebdf95838d6db3898f4e58 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftChunkSnapshot.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftChunkSnapshot.java
@@ -99,7 +99,7 @@ public class CraftChunkSnapshot implements ChunkSnapshot {
public Material getBlockType(int x, int y, int z) {
this.validateChunkCoordinates(x, y, z);
- return CraftBlockType.minecraftToBukkit(this.blockids[this.getSectionIndex(y)].get(x, y & 0xF, z).getBlock());
+ return this.blockids[this.getSectionIndex(y)].get(x, y & 0xF, z).getBukkitMaterial(); // Paper - optimise getType calls
}
@Override
diff --git a/src/main/java/org/bukkit/craftbukkit/block/CraftBlock.java b/src/main/java/org/bukkit/craftbukkit/block/CraftBlock.java
index a586442422a2b2c06b785af0d261d3e19eb1d59b..aa644231425b9622437538b5c092d4064a40cced 100644
--- a/src/main/java/org/bukkit/craftbukkit/block/CraftBlock.java
+++ b/src/main/java/org/bukkit/craftbukkit/block/CraftBlock.java
@@ -220,7 +220,7 @@ public class CraftBlock implements Block {
@Override
public Material getType() {
- return CraftBlockType.minecraftToBukkit(this.world.getBlockState(this.position).getBlock());
+ return this.world.getBlockState(this.position).getBukkitMaterial(); // Paper - optimise getType calls
}
@Override
diff --git a/src/main/java/org/bukkit/craftbukkit/block/CraftBlockState.java b/src/main/java/org/bukkit/craftbukkit/block/CraftBlockState.java
index fabdec2d66cc6d676ed58fa570e2c318ab0927e2..1002123cd0c6f57cecc4e80f5f21cc6ff5886d37 100644
--- a/src/main/java/org/bukkit/craftbukkit/block/CraftBlockState.java
+++ b/src/main/java/org/bukkit/craftbukkit/block/CraftBlockState.java
@@ -175,7 +175,7 @@ public class CraftBlockState implements BlockState {
@Override
public Material getType() {
- return CraftBlockType.minecraftToBukkit(this.data.getBlock());
+ return this.data.getBukkitMaterial(); // Paper - optimise getType calls
}
public void setFlag(int flag) {
diff --git a/src/main/java/org/bukkit/craftbukkit/block/data/CraftBlockData.java b/src/main/java/org/bukkit/craftbukkit/block/data/CraftBlockData.java
index 67ff2241aa8869b41abb0a93467b8694618264e2..9953b6b36cbcbfd1756bac478b568ca5700fc898 100644
--- a/src/main/java/org/bukkit/craftbukkit/block/data/CraftBlockData.java
+++ b/src/main/java/org/bukkit/craftbukkit/block/data/CraftBlockData.java
@@ -61,7 +61,7 @@ public class CraftBlockData implements BlockData {
@Override
public Material getMaterial() {
- return CraftBlockType.minecraftToBukkit(this.state.getBlock());
+ return this.state.getBukkitMaterial(); // Paper - optimise getType calls
}
public net.minecraft.world.level.block.state.BlockState getState() {
diff --git a/src/main/java/org/bukkit/craftbukkit/generator/CraftChunkData.java b/src/main/java/org/bukkit/craftbukkit/generator/CraftChunkData.java
index c96aaa185d9d929cb19f427be82053f0cfa13bad..0fb580530d0b6d4d63ea4b85fec9240eb5c74df4 100644
--- a/src/main/java/org/bukkit/craftbukkit/generator/CraftChunkData.java
+++ b/src/main/java/org/bukkit/craftbukkit/generator/CraftChunkData.java
@@ -96,7 +96,7 @@ public final class CraftChunkData implements ChunkGenerator.ChunkData {
@Override
public Material getType(int x, int y, int z) {
- return CraftBlockType.minecraftToBukkit(this.getTypeId(x, y, z).getBlock());
+ return this.getTypeId(x, y, z).getBukkitMaterial(); // Paper - optimise getType calls
}
@Override