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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.
53 lines
2.6 KiB
Diff
53 lines
2.6 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Aikar <aikar@aikar.co>
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Date: Wed, 12 Sep 2018 21:47:01 -0400
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Subject: [PATCH] Optimize Biome Mob Lookups for Mob Spawning
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Uses an EnumMap as well as a Set paired List for O(1) contains calls.
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diff --git a/src/main/java/net/minecraft/world/level/biome/MobSpawnSettings.java b/src/main/java/net/minecraft/world/level/biome/MobSpawnSettings.java
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index d6ebd2ebc3a4a184f1237b00c6c4e709c61d2eec..cb7465ed9bdebe1b31f02d11725e75ff8b44ca66 100644
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--- a/src/main/java/net/minecraft/world/level/biome/MobSpawnSettings.java
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+++ b/src/main/java/net/minecraft/world/level/biome/MobSpawnSettings.java
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@@ -75,8 +75,40 @@ public class MobSpawnSettings {
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}
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public static class Builder {
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+ // Paper start - Perf: keep track of data in a pair set to give O(1) contains calls - we have to hook removals incase plugins mess with it
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+ public static class MobList extends java.util.ArrayList<MobSpawnSettings.SpawnerData> {
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+ java.util.Set<MobSpawnSettings.SpawnerData> biomes = new java.util.HashSet<>();
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+
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+ @Override
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+ public boolean contains(Object o) {
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+ return biomes.contains(o);
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+ }
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+
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+ @Override
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+ public boolean add(MobSpawnSettings.SpawnerData BiomeSettingsMobs) {
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+ biomes.add(BiomeSettingsMobs);
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+ return super.add(BiomeSettingsMobs);
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+ }
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+
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+ @Override
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+ public MobSpawnSettings.SpawnerData remove(int index) {
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+ MobSpawnSettings.SpawnerData removed = super.remove(index);
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+ if (removed != null) {
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+ biomes.remove(removed);
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+ }
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+ return removed;
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+ }
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+
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+ @Override
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+ public void clear() {
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+ biomes.clear();
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+ super.clear();
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+ }
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+ }
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+ // use toImmutableEnumMap collector
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private final Map<MobCategory, List<MobSpawnSettings.SpawnerData>> spawners = Stream.of(MobCategory.values())
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- .collect(ImmutableMap.toImmutableMap(mobCategory -> (MobCategory)mobCategory, mobCategory -> Lists.newArrayList()));
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+ .collect(Maps.toImmutableEnumMap(mobCategory -> (MobCategory)mobCategory, mobCategory -> new MobList())); // Use MobList instead of ArrayList
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+ // Paper end - Perf: keep track of data in a pair set to give O(1) contains calls
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private final Map<EntityType<?>, MobSpawnSettings.MobSpawnCost> mobSpawnCosts = Maps.newLinkedHashMap();
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private float creatureGenerationProbability = 0.1F;
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