PaperMC/Spigot-Server-Patches/0378-Optimize-Light-Recalculations.patch
Aikar 2a2d9fb508
Improvements to Logging Warnings/Dupe Entities - Resolves #1544
1) Removed "Regen" mode of Dupe UUID resolver, forced safe.
Some servers who updated before we had safe mode added still had this value.

There's really no reason to keep this mode, as we've seen that vanilla
triggers this often and 99.9999999% of cases will be an actual duplicate
that needs to be deleted.

2) Made Vanilla Debug messages about dupe UUIDs and dupe uuid resolve messages
only show up if the debug.entities flag is on. This will stop server owners
from panicing from seeing these logs, and stop opening bug reports on this,
only for us to tell you "don't worry about it".

3) Avoid adding entities to world that are already added to world.

This can be triggered by anything that causes an entity to be added
to the world during the chunk load process, such as chunk conversions.

Issue #1544 was a case of this.

4) Removed debug warning about ExpiringMap.

Nothing more I know to do about this anyways. We recover from it,
stop warning to reduce noise of issues to us.
2018-10-07 15:10:23 -04:00

77 lines
4 KiB
Diff

From 39fd972d4e2eb1a6ae58e4a8ca9203978ec102ec Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Fri, 28 Sep 2018 20:46:29 -0400
Subject: [PATCH] Optimize Light Recalculations
The server triggers light recalculations even if the new block
is the same as the old block. At this time, BlockData Properties
do not impact light calculations.
So the only way light should change, is if the block itself
changes from 1 block to another.
Also optimizes to not repeatedly look up the same chunk for
light lookups.
diff --git a/src/main/java/net/minecraft/server/Chunk.java b/src/main/java/net/minecraft/server/Chunk.java
index cb99888707..027f98633e 100644
--- a/src/main/java/net/minecraft/server/Chunk.java
+++ b/src/main/java/net/minecraft/server/Chunk.java
@@ -347,7 +347,7 @@ public class Chunk implements IChunkAccess {
private void a(int i, int j, int k, int l) {
if (l > k && this.areNeighborsLoaded(1)) { // Paper
for (int i1 = k; i1 < l; ++i1) {
- this.world.c(EnumSkyBlock.SKY, new BlockPosition(i, i1, j));
+ this.world.updateBrightness(EnumSkyBlock.SKY, new BlockPosition(i, i1, j), this); // Paper
}
this.x = true;
@@ -578,7 +578,7 @@ public class Chunk implements IChunkAccess {
} else {
if (flag1) {
this.initLighting();
- } else {
+ } else if (block != block1) { // Paper - Optimize light recalculations
this.runOrQueueLightUpdate(() -> { // Paper - Queue light update
int i1 = iblockdata.b(this.world, blockposition);
int j1 = iblockdata1.b(this.world, blockposition);
diff --git a/src/main/java/net/minecraft/server/World.java b/src/main/java/net/minecraft/server/World.java
index bbcedb8fc7..a19e941174 100644
--- a/src/main/java/net/minecraft/server/World.java
+++ b/src/main/java/net/minecraft/server/World.java
@@ -445,7 +445,7 @@ public abstract class World implements IEntityAccess, GeneratorAccess, IIBlockAc
} else {
IBlockData iblockdata2 = this.getType(blockposition);
- if (iblockdata2.b(this, blockposition) != iblockdata1.b(this, blockposition) || iblockdata2.e() != iblockdata1.e()) {
+ if (iblockdata.getBlock() != iblockdata2.getBlock() && iblockdata2.b(this, blockposition) != iblockdata1.b(this, blockposition) || iblockdata2.e() != iblockdata1.e()) { // Paper - optimize light recalculations
this.methodProfiler.a("checkLight");
chunk.runOrQueueLightUpdate(() -> this.r(blockposition)); // Paper - Queue light update
this.methodProfiler.e();
@@ -589,8 +589,9 @@ public abstract class World implements IEntityAccess, GeneratorAccess, IIBlockAc
}
if (this.worldProvider.g()) {
- for (i1 = k; i1 <= l; ++i1) {
- this.c(EnumSkyBlock.SKY, new BlockPosition(i, i1, j));
+ Chunk chunk = getChunkIfLoaded(i >> 4, j >> 4); // Paper
+ for (i1 = k; chunk != null && i1 <= l; ++i1) { // Paper
+ this.updateBrightness(EnumSkyBlock.SKY, new BlockPosition(i, i1, j), chunk); // Paper
}
}
@@ -2294,6 +2295,11 @@ public abstract class World implements IEntityAccess, GeneratorAccess, IIBlockAc
public boolean c(EnumSkyBlock enumskyblock, BlockPosition blockposition) {
// CraftBukkit start - Use neighbor cache instead of looking up
Chunk chunk = this.getChunkIfLoaded(blockposition.getX() >> 4, blockposition.getZ() >> 4);
+ // Paper start - optimize light updates where chunk is known
+ return updateBrightness(enumskyblock, blockposition, chunk);
+ }
+ public boolean updateBrightness(EnumSkyBlock enumskyblock, BlockPosition blockposition, Chunk chunk) {
+ // Paper end
if (chunk == null || !chunk.areNeighborsLoaded(1) /*!this.areChunksLoaded(blockposition, 17, false)*/) {
// CraftBukkit end
return false;
--
2.19.0