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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.
64 lines
3.0 KiB
Diff
64 lines
3.0 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Paul Sauve <paul@technove.co>
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Date: Sun, 9 May 2021 16:49:49 -0500
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Subject: [PATCH] Use array for gamerule storage
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diff --git a/src/main/java/net/minecraft/world/level/GameRules.java b/src/main/java/net/minecraft/world/level/GameRules.java
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index 51e560d7856f230c5aa2dc32706c3a4996720aa5..89e327bc3a45879fe68887c7aadb077f31a770eb 100644
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--- a/src/main/java/net/minecraft/world/level/GameRules.java
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+++ b/src/main/java/net/minecraft/world/level/GameRules.java
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@@ -122,6 +122,7 @@ public class GameRules {
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worldserver.setDefaultSpawnPos(worldserver.getSharedSpawnPos(), worldserver.getSharedSpawnAngle());
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}));
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private final Map<GameRules.Key<?>, GameRules.Value<?>> rules;
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+ private final GameRules.Value<?>[] gameruleArray; // Paper - Perf: Use array for gamerule storage
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private static <T extends GameRules.Value<T>> GameRules.Key<T> register(String name, GameRules.Category category, GameRules.Type<T> type) {
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GameRules.Key<T> gamerules_gamerulekey = new GameRules.Key<>(name, category);
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@@ -140,17 +141,30 @@ public class GameRules {
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}
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public GameRules() {
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- this.rules = (Map) GameRules.GAME_RULE_TYPES.entrySet().stream().collect(ImmutableMap.toImmutableMap(Entry::getKey, (entry) -> {
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+ // Paper start - Perf: Use array for gamerule storage
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+ this((Map) GameRules.GAME_RULE_TYPES.entrySet().stream().collect(ImmutableMap.toImmutableMap(Entry::getKey, (entry) -> {
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return ((GameRules.Type) entry.getValue()).createRule();
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- }));
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+ })));
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+ // Paper end - Perf: Use array for gamerule storage
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}
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private GameRules(Map<GameRules.Key<?>, GameRules.Value<?>> rules) {
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this.rules = rules;
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+
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+ // Paper start - Perf: Use array for gamerule storage
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+ int arraySize = rules.keySet().stream().mapToInt(key -> key.gameRuleIndex).max().orElse(-1) + 1;
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+ GameRules.Value<?>[] values = new GameRules.Value[arraySize];
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+
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+ for (Entry<GameRules.Key<?>, GameRules.Value<?>> entry : rules.entrySet()) {
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+ values[entry.getKey().gameRuleIndex] = entry.getValue();
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+ }
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+
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+ this.gameruleArray = values;
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+ // Paper end - Perf: Use array for gamerule storage
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}
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public <T extends GameRules.Value<T>> T getRule(GameRules.Key<T> key) {
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- return (T) this.rules.get(key); // CraftBukkit - decompile error
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+ return key == null ? null : (T) this.gameruleArray[key.gameRuleIndex]; // Paper - Perf: Use array for gamerule storage
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}
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public CompoundTag createTag() {
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@@ -209,6 +223,10 @@ public class GameRules {
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}
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public static final class Key<T extends GameRules.Value<T>> {
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+ // Paper start - Perf: Use array for gamerule storage
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+ private static int lastGameRuleIndex = 0;
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+ public final int gameRuleIndex = lastGameRuleIndex++;
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+ // Paper end - Perf: Use array for gamerule storage
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final String id;
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private final GameRules.Category category;
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