107 lines
6.2 KiB
Diff
107 lines
6.2 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Spottedleaf <spottedleaf@spottedleaf.dev>
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Date: Thu, 7 May 2020 05:48:54 -0700
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Subject: [PATCH] Optimise chunk tick iteration
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Use a dedicated list of entity ticking chunks to reduce the cost
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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 280ca8758cbaf710c2bf357e41dd2af6e14b49bc..ad352b4b67632f9984c4d10994a9acfe434a4996 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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@@ -999,34 +999,46 @@ public class ServerChunkCache extends ChunkSource {
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this.lastSpawnState = spawnercreature_d;
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gameprofilerfiller.popPush("filteringLoadedChunks");
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- List<ServerChunkCache.ChunkAndHolder> list = Lists.newArrayListWithCapacity(l);
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- Iterator iterator = this.chunkMap.getChunks().iterator();
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+ // Paper - moved down
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this.level.timings.chunkTicks.startTiming(); // Paper
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- while (iterator.hasNext()) {
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- ChunkHolder playerchunk = (ChunkHolder) iterator.next();
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- LevelChunk chunk = playerchunk.getTickingChunk();
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-
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- if (chunk != null) {
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- list.add(new ServerChunkCache.ChunkAndHolder(chunk, playerchunk));
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- }
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- }
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+ // Paper - moved down
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gameprofilerfiller.popPush("spawnAndTick");
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boolean flag2 = this.level.getGameRules().getBoolean(GameRules.RULE_DOMOBSPAWNING) && !this.level.players().isEmpty(); // CraftBukkit
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- Collections.shuffle(list);
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+ // Paper - only shuffle if per-player mob spawning is disabled
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// Paper - moved natural spawn event up
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- Iterator iterator1 = list.iterator();
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+ // Paper start - optimise chunk tick iteration
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+ Iterator<LevelChunk> iterator1;
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+ if (this.level.paperConfig.perPlayerMobSpawns) {
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+ iterator1 = this.entityTickingChunks.iterator();
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+ } else {
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+ iterator1 = this.entityTickingChunks.unsafeIterator();
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+ List<LevelChunk> shuffled = Lists.newArrayListWithCapacity(this.entityTickingChunks.size());
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+ while (iterator1.hasNext()) {
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+ shuffled.add(iterator1.next());
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+ }
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+ Collections.shuffle(shuffled);
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+ iterator1 = shuffled.iterator();
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+ }
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+ try {
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while (iterator1.hasNext()) {
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- ServerChunkCache.ChunkAndHolder chunkproviderserver_a = (ServerChunkCache.ChunkAndHolder) iterator1.next();
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- LevelChunk chunk1 = chunkproviderserver_a.chunk;
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+ LevelChunk chunk1 = iterator1.next();
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+ ChunkHolder holder = chunk1.playerChunk;
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+ if (holder != null) {
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+ gameprofilerfiller.popPush("broadcast");
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+ this.level.timings.broadcastChunkUpdates.startTiming(); // Paper - timing
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+ holder.broadcastChanges(chunk1);
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+ this.level.timings.broadcastChunkUpdates.stopTiming(); // Paper - timing
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+ gameprofilerfiller.pop();
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+ // Paper end - optimise chunk tick iteration
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ChunkPos chunkcoordintpair = chunk1.getPos();
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- if (this.level.isPositionEntityTicking(chunkcoordintpair) && this.chunkMap.anyPlayerCloseEnoughForSpawning(chunkproviderserver_a.holder, chunkcoordintpair, false)) { // Paper - optimise anyPlayerCloseEnoughForSpawning
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+ if ((true || this.level.isPositionEntityTicking(chunkcoordintpair)) && this.chunkMap.anyPlayerCloseEnoughForSpawning(holder, chunkcoordintpair, false)) { // Paper - optimise anyPlayerCloseEnoughForSpawning & optimise chunk tick iteration
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chunk1.incrementInhabitedTime(j);
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- if (flag2 && (this.spawnEnemies || this.spawnFriendlies) && this.level.getWorldBorder().isWithinBounds(chunkcoordintpair) && this.chunkMap.anyPlayerCloseEnoughForSpawning(chunkproviderserver_a.holder, chunkcoordintpair, true)) { // Spigot // Paper - optimise anyPlayerCloseEnoughForSpawning
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+ if (flag2 && (this.spawnEnemies || this.spawnFriendlies) && this.level.getWorldBorder().isWithinBounds(chunkcoordintpair) && this.chunkMap.anyPlayerCloseEnoughForSpawning(holder, chunkcoordintpair, true)) { // Spigot // Paper - optimise anyPlayerCloseEnoughForSpawning & optimise chunk tick iteration
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NaturalSpawner.spawnForChunk(this.level, chunk1, spawnercreature_d, this.spawnFriendlies, this.spawnEnemies, flag1);
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}
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@@ -1034,7 +1046,16 @@ public class ServerChunkCache extends ChunkSource {
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this.level.tickChunk(chunk1, k);
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}
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}
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+ // Paper start - optimise chunk tick iteration
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+ }
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}
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+
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+ } finally {
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+ if (iterator1 instanceof io.papermc.paper.util.maplist.IteratorSafeOrderedReferenceSet.Iterator safeIterator) {
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+ safeIterator.finishedIterating();
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+ }
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+ }
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+ // Paper end - optimise chunk tick iteration
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this.level.timings.chunkTicks.stopTiming(); // Paper
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gameprofilerfiller.popPush("customSpawners");
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if (flag2) {
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@@ -1043,13 +1064,7 @@ public class ServerChunkCache extends ChunkSource {
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} // Paper - timings
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}
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- gameprofilerfiller.popPush("broadcast");
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- list.forEach((chunkproviderserver_a1) -> {
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- this.level.timings.broadcastChunkUpdates.startTiming(); // Paper - timing
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- chunkproviderserver_a1.holder.broadcastChanges(chunkproviderserver_a1.chunk);
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- this.level.timings.broadcastChunkUpdates.stopTiming(); // Paper - timing
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- });
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- gameprofilerfiller.pop();
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+ // Paper - no, iterating just ONCE is expensive enough! Don't do it TWICE! Code moved up
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gameprofilerfiller.pop();
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this.chunkMap.tick();
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}
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