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Paper/Spigot-Server-Patches/0085-Optimized-Light-Level-Comparisons.patch
Aikar 3faaaab75d Optimize isInvalidYLocation, getType and getBlockData 
Some pretty micro optimizations, but this is the hottest method in the server....

This will drastically reduce number of operations to perform getType

the 2 previous patches was squashed into 1
2016-06-22 22:43:02 -04:00

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From 91c2e62925acb46c336de017322ee57ab965c3c0 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Fri, 18 Mar 2016 21:22:56 -0400
Subject: [PATCH] Optimized Light Level Comparisons
Use an optimized method to test if a block position meets a desired light level.
This method benefits from returning as soon as the desired light level matches.
diff --git a/src/main/java/net/minecraft/server/BlockCrops.java b/src/main/java/net/minecraft/server/BlockCrops.java
index 7d44039..4ede2cf 100644
--- a/src/main/java/net/minecraft/server/BlockCrops.java
+++ b/src/main/java/net/minecraft/server/BlockCrops.java
@@ -49,7 +49,7 @@ public class BlockCrops extends BlockPlant implements IBlockFragilePlantElement
public void b(World world, BlockPosition blockposition, IBlockData iblockdata, Random random) {
super.b(world, blockposition, iblockdata, random);
- if (world.getLightLevel(blockposition.up()) >= 9) {
+ if (world.isLightLevel(blockposition.up(), 9)) { // Paper
int i = this.x(iblockdata);
if (i < this.g()) {
diff --git a/src/main/java/net/minecraft/server/BlockGrass.java b/src/main/java/net/minecraft/server/BlockGrass.java
index 11d9d3f..21e722d 100644
--- a/src/main/java/net/minecraft/server/BlockGrass.java
+++ b/src/main/java/net/minecraft/server/BlockGrass.java
@@ -30,7 +30,8 @@ public class BlockGrass extends Block implements IBlockFragilePlantElement {
public void b(World world, BlockPosition blockposition, IBlockData iblockdata, Random random) {
if (!world.isClientSide) {
- if (world.getLightLevel(blockposition.up()) < 4 && world.getType(blockposition.up()).c() > 2) {
+ int lightLevel = -1; // Paper
+ if (world.getType(blockposition.up()).c() > 2 && (lightLevel = world.getLightLevel(blockposition.up())) < 4) { // Paper - move light check to end to avoid unneeded light lookups
// CraftBukkit start
// world.setTypeUpdate(blockposition, Blocks.DIRT.getBlockData());
org.bukkit.World bworld = world.getWorld();
@@ -45,18 +46,25 @@ public class BlockGrass extends Block implements IBlockFragilePlantElement {
}
// CraftBukkit end
} else {
- if (world.getLightLevel(blockposition.up()) >= 9) {
+ // Paper start
+ // If light was calculated above, reuse it, else grab it
+ if (lightLevel == -1) {
+ lightLevel = world.getLightLevel(blockposition.up());
+ }
+ if (lightLevel >= 9) {
+ // Paper end
for (int i = 0; i < 4; ++i) {
BlockPosition blockposition1 = blockposition.a(random.nextInt(3) - 1, random.nextInt(5) - 3, random.nextInt(3) - 1);
- if (blockposition1.getY() >= 0 && blockposition1.getY() < 256 && !world.isLoaded(blockposition1)) {
+ IBlockData iblockdata2 = world.getTypeIfLoaded(blockposition1); // Paper - moved up
+ if (iblockdata2 == null) { // Paper
return;
}
IBlockData iblockdata1 = world.getType(blockposition1.up());
- IBlockData iblockdata2 = world.getType(blockposition1);
+ //IBlockData iblockdata2 = world.getTypeIfLoaded(blockposition1); // Paper - moved up
- if (iblockdata2.getBlock() == Blocks.DIRT && iblockdata2.get(BlockDirt.VARIANT) == BlockDirt.EnumDirtVariant.DIRT && world.getLightLevel(blockposition1.up()) >= 4 && iblockdata1.c() <= 2) {
+ if (iblockdata2.getBlock() == Blocks.DIRT && iblockdata2.get(BlockDirt.VARIANT) == BlockDirt.EnumDirtVariant.DIRT && iblockdata1.c() <= 2 && world.isLightLevel(blockposition1.up(), 4)) { // Paper - move last check before isLightLevel to avoid unneeded light checks
// CraftBukkit start
// world.setTypeUpdate(blockposition1, Blocks.GRASS.getBlockData());
org.bukkit.World bworld = world.getWorld();
diff --git a/src/main/java/net/minecraft/server/BlockSapling.java b/src/main/java/net/minecraft/server/BlockSapling.java
index 4118fd1..97784f1 100644
--- a/src/main/java/net/minecraft/server/BlockSapling.java
+++ b/src/main/java/net/minecraft/server/BlockSapling.java
@@ -34,7 +34,7 @@ public class BlockSapling extends BlockPlant implements IBlockFragilePlantElemen
public void b(World world, BlockPosition blockposition, IBlockData iblockdata, Random random) {
if (!world.isClientSide) {
super.b(world, blockposition, iblockdata, random);
- if (world.getLightLevel(blockposition.up()) >= 9 && random.nextInt(Math.max(2, (int) (((100.0F / world.spigotConfig.saplingModifier) * 7) + 0.5F))) == 0) { // Spigot
+ if (world.isLightLevel(blockposition.up(), 9) && random.nextInt(Math.max(2, (int) (((100.0F / world.spigotConfig.saplingModifier) * 7) + 0.5F))) == 0) { // Spigot // Paper
// CraftBukkit start
world.captureTreeGeneration = true;
// CraftBukkit end
diff --git a/src/main/java/net/minecraft/server/BlockStem.java b/src/main/java/net/minecraft/server/BlockStem.java
index d378ea4..1185100 100644
--- a/src/main/java/net/minecraft/server/BlockStem.java
+++ b/src/main/java/net/minecraft/server/BlockStem.java
@@ -48,7 +48,7 @@ public class BlockStem extends BlockPlant implements IBlockFragilePlantElement {
public void b(World world, BlockPosition blockposition, IBlockData iblockdata, Random random) {
super.b(world, blockposition, iblockdata, random);
- if (world.getLightLevel(blockposition.up()) >= 9) {
+ if (world.isLightLevel(blockposition.up(), 9)) { // Paper
float f = BlockCrops.a((Block) this, world, blockposition);
if (random.nextInt((int) ((100.0F / (this == Blocks.PUMPKIN_STEM ? world.spigotConfig.pumpkinModifier : world.spigotConfig.melonModifier)) * (25.0F / f)) + 1) == 0) { // Spigot
diff --git a/src/main/java/net/minecraft/server/EntityMonster.java b/src/main/java/net/minecraft/server/EntityMonster.java
index 1aef91a..733fec7 100644
--- a/src/main/java/net/minecraft/server/EntityMonster.java
+++ b/src/main/java/net/minecraft/server/EntityMonster.java
@@ -122,17 +122,17 @@ public abstract class EntityMonster extends EntityCreature implements IMonster {
if (this.world.b(EnumSkyBlock.SKY, blockposition) > this.random.nextInt(32)) {
return false;
} else {
- int i = this.world.getLightLevel(blockposition);
-
+ //int i = this.world.getLightLevel(blockposition); // Paper
+ boolean passes; // Paper
if (this.world.V()) {
int j = this.world.af();
this.world.c(10);
- i = this.world.getLightLevel(blockposition);
+ passes = !world.isLightLevel(blockposition, this.random.nextInt(9)); // Paper
this.world.c(j);
- }
+ } else { passes = !world.isLightLevel(blockposition, this.random.nextInt(9)); } // Paper
- return i <= this.random.nextInt(8);
+ return passes; // Paper
}
}
diff --git a/src/main/java/net/minecraft/server/EntityZombie.java b/src/main/java/net/minecraft/server/EntityZombie.java
index 6981185..798b9c5 100644
--- a/src/main/java/net/minecraft/server/EntityZombie.java
+++ b/src/main/java/net/minecraft/server/EntityZombie.java
@@ -195,7 +195,7 @@ public class EntityZombie extends EntityMonster {
int j1 = j + MathHelper.nextInt(this.random, 7, 40) * MathHelper.nextInt(this.random, -1, 1);
int k1 = k + MathHelper.nextInt(this.random, 7, 40) * MathHelper.nextInt(this.random, -1, 1);
- if (this.world.getType(new BlockPosition(i1, j1 - 1, k1)).q() && this.world.getLightLevel(new BlockPosition(i1, j1, k1)) < 10) {
+ if (this.world.getType(new BlockPosition(i1, j1 - 1, k1)).q() && !this.world.isLightLevel(new BlockPosition(i1, j1, k1), 10)) { // Paper
entityzombie.setPosition((double) i1, (double) j1, (double) k1);
if (!this.world.isPlayerNearby((double) i1, (double) j1, (double) k1, 7.0D, EntityHuman.affectsSpawningFilter()) && this.world.a(entityzombie.getBoundingBox(), (Entity) entityzombie) && this.world.getCubes(entityzombie, entityzombie.getBoundingBox()).isEmpty() && !this.world.containsLiquid(entityzombie.getBoundingBox())) { // Paper - affectsSpawning filter
this.world.addEntity(entityzombie, CreatureSpawnEvent.SpawnReason.REINFORCEMENTS); // CraftBukkit
--
2.9.0
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