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https://github.com/PaperMC/Paper.git
synchronisiert 2024-12-15 02:50:09 +01:00
c5a10665b8
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.
61 Zeilen
2.7 KiB
Diff
61 Zeilen
2.7 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Spottedleaf <Spottedleaf@users.noreply.github.com>
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Date: Sat, 25 Jan 2020 17:04:35 -0800
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Subject: [PATCH] Optimise getChunkAt calls for loaded chunks
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bypass the need to get a player chunk, then get the either,
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then unwrap it...
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diff --git a/src/main/java/net/minecraft/server/level/ServerChunkCache.java b/src/main/java/net/minecraft/server/level/ServerChunkCache.java
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index a939bad7da9c852827a2d67d9ace5d0df4911a31..1049452baaf0381ffbf15b30da956c2a1994da35 100644
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--- a/src/main/java/net/minecraft/server/level/ServerChunkCache.java
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+++ b/src/main/java/net/minecraft/server/level/ServerChunkCache.java
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@@ -179,6 +179,12 @@ public class ServerChunkCache extends ChunkSource {
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return this.getChunk(x, z, leastStatus, create);
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}, this.mainThreadProcessor).join();
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} else {
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+ // Paper start - Perf: Optimise getChunkAt calls for loaded chunks
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+ LevelChunk ifLoaded = this.getChunkAtIfLoadedMainThread(x, z);
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+ if (ifLoaded != null) {
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+ return ifLoaded;
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+ }
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+ // Paper end - Perf: Optimise getChunkAt calls for loaded chunks
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ProfilerFiller gameprofilerfiller = this.level.getProfiler();
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gameprofilerfiller.incrementCounter("getChunk");
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@@ -222,33 +228,7 @@ public class ServerChunkCache extends ChunkSource {
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if (Thread.currentThread() != this.mainThread) {
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return null;
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} else {
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- this.level.getProfiler().incrementCounter("getChunkNow");
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- long k = ChunkPos.asLong(chunkX, chunkZ);
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-
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- ChunkAccess ichunkaccess;
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-
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- for (int l = 0; l < 4; ++l) {
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- if (k == this.lastChunkPos[l] && this.lastChunkStatus[l] == ChunkStatus.FULL) {
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- ichunkaccess = this.lastChunk[l];
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- return ichunkaccess instanceof LevelChunk ? (LevelChunk) ichunkaccess : null;
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- }
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- }
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-
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- ChunkHolder playerchunk = this.getVisibleChunkIfPresent(k);
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-
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- if (playerchunk == null) {
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- return null;
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- } else {
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- ichunkaccess = playerchunk.getChunkIfPresent(ChunkStatus.FULL);
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- if (ichunkaccess != null) {
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- this.storeInCache(k, ichunkaccess, ChunkStatus.FULL);
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- if (ichunkaccess instanceof LevelChunk) {
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- return (LevelChunk) ichunkaccess;
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- }
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- }
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-
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- return null;
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- }
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+ return this.getChunkAtIfLoadedMainThread(chunkX, chunkZ); // Paper - Perf: Optimise getChunkAt calls for loaded chunks
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}
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}
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