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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Spottedleaf <Spottedleaf@users.noreply.github.com>
Date: Sat, 25 Jan 2020 17:04:35 -0800
Subject: [PATCH] Optimise getChunkAt calls for loaded chunks
bypass the need to get a player chunk, then get the either,
then unwrap it...
diff --git a/src/main/java/net/minecraft/server/level/ServerChunkCache.java b/src/main/java/net/minecraft/server/level/ServerChunkCache.java
index d9743139d1cb932c6aac56da85f073e4dfe2933c..603f9d1f501a18214f11a6e401f2c43d9c3cf8eb 100644
--- a/src/main/java/net/minecraft/server/level/ServerChunkCache.java
+++ b/src/main/java/net/minecraft/server/level/ServerChunkCache.java
@@ -270,6 +270,12 @@ public class ServerChunkCache extends ChunkSource {
return this.getChunk(x, z, leastStatus, create);
}, this.mainThreadProcessor).join();
} else {
+ // Paper start - optimise for loaded chunks
+ LevelChunk ifLoaded = this.getChunkAtIfLoadedMainThread(x, z);
+ if (ifLoaded != null) {
+ return ifLoaded;
+ }
+ // Paper end
ProfilerFiller gameprofilerfiller = this.level.getProfiler();
gameprofilerfiller.incrementCounter("getChunk");
@@ -313,39 +319,7 @@ public class ServerChunkCache extends ChunkSource {
if (!io.papermc.paper.util.TickThread.isTickThread()) { // Paper - rewrite chunk system
return null;
} else {
- this.level.getProfiler().incrementCounter("getChunkNow");
- long k = ChunkPos.asLong(chunkX, chunkZ);
-
- for (int l = 0; l < 4; ++l) {
- if (k == this.lastChunkPos[l] && this.lastChunkStatus[l] == ChunkStatus.FULL) {
- ChunkAccess ichunkaccess = this.lastChunk[l];
-
- return ichunkaccess instanceof LevelChunk ? (LevelChunk) ichunkaccess : null;
- }
- }
-
- ChunkHolder playerchunk = this.getVisibleChunkIfPresent(k);
-
- if (playerchunk == null) {
- return null;
- } else {
- Either<ChunkAccess, ChunkHolder.ChunkLoadingFailure> either = (Either) playerchunk.getFutureIfPresent(ChunkStatus.FULL).getNow(null); // CraftBukkit - decompile error
-
- if (either == null) {
- return null;
- } else {
- ChunkAccess ichunkaccess1 = (ChunkAccess) either.left().orElse(null); // CraftBukkit - decompile error
-
- if (ichunkaccess1 != null) {
- this.storeInCache(k, ichunkaccess1, ChunkStatus.FULL);
- if (ichunkaccess1 instanceof LevelChunk) {
- return (LevelChunk) ichunkaccess1;
- }
- }
-
- return null;
- }
- }
+ return this.getChunkAtIfLoadedMainThread(chunkX, chunkZ); // Paper - optimise for loaded chunks
}
}
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