Paper/patches/server/0860-Use-array-for-gamerule-storage.patch
Owen 89d51d5f29
Allow enabling sand duping (#10191)
Because this exploit has been widely known for years and has not been fixed by Mojang, we decided that it was worth allowing people to toggle it on/off due to how easy it is to make it configurable.

It should be noted that this decision does not promise all future exploits will be configurable.
2024-03-03 17:05:34 -05:00

64 lines
3.3 KiB
Diff

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Paul Sauve <paul@technove.co>
Date: Sun, 9 May 2021 16:49:49 -0500
Subject: [PATCH] Use array for gamerule storage
diff --git a/src/main/java/net/minecraft/world/level/GameRules.java b/src/main/java/net/minecraft/world/level/GameRules.java
index ac7a5410b01a6741e3b548d153f37ea1d8c1a4cb..4a340bd1f1859e43bb58e68aee4018fdb4ca7a5a 100644
--- a/src/main/java/net/minecraft/world/level/GameRules.java
+++ b/src/main/java/net/minecraft/world/level/GameRules.java
@@ -115,6 +115,7 @@ public class GameRules {
public static final GameRules.Key<GameRules.BooleanValue> RULE_DO_VINES_SPREAD = GameRules.register("doVinesSpread", GameRules.Category.UPDATES, GameRules.BooleanValue.create(true));
public static final GameRules.Key<GameRules.BooleanValue> RULE_ENDER_PEARLS_VANISH_ON_DEATH = GameRules.register("enderPearlsVanishOnDeath", GameRules.Category.PLAYER, GameRules.BooleanValue.create(true));
private final Map<GameRules.Key<?>, GameRules.Value<?>> rules;
+ private final GameRules.Value<?>[] gameruleArray; // Paper - Perf: Use array for gamerule storage
private static <T extends GameRules.Value<T>> GameRules.Key<T> register(String name, GameRules.Category category, GameRules.Type<T> type) {
GameRules.Key<T> gamerules_gamerulekey = new GameRules.Key<>(name, category);
@@ -133,17 +134,30 @@ public class GameRules {
}
public GameRules() {
- this.rules = (Map) GameRules.GAME_RULE_TYPES.entrySet().stream().collect(ImmutableMap.toImmutableMap(Entry::getKey, (entry) -> {
+ // Paper start - Perf: Use array for gamerule storage
+ this((Map) GameRules.GAME_RULE_TYPES.entrySet().stream().collect(ImmutableMap.toImmutableMap(Entry::getKey, (entry) -> {
return ((GameRules.Type) entry.getValue()).createRule();
- }));
+ })));
+ // Paper end - Perf: Use array for gamerule storage
}
private GameRules(Map<GameRules.Key<?>, GameRules.Value<?>> rules) {
this.rules = rules;
+
+ // Paper start - Perf: Use array for gamerule storage
+ int arraySize = rules.keySet().stream().mapToInt(key -> key.gameRuleIndex).max().orElse(-1) + 1;
+ GameRules.Value<?>[] values = new GameRules.Value[arraySize];
+
+ for (Entry<GameRules.Key<?>, GameRules.Value<?>> entry : rules.entrySet()) {
+ values[entry.getKey().gameRuleIndex] = entry.getValue();
+ }
+
+ this.gameruleArray = values;
+ // Paper end - Perf: Use array for gamerule storage
}
public <T extends GameRules.Value<T>> T getRule(GameRules.Key<T> key) {
- return (T) this.rules.get(key); // CraftBukkit - decompile error
+ return key == null ? null : (T) this.gameruleArray[key.gameRuleIndex]; // Paper - Perf: Use array for gamerule storage
}
public CompoundTag createTag() {
@@ -202,6 +216,10 @@ public class GameRules {
}
public static final class Key<T extends GameRules.Value<T>> {
+ // Paper start - Perf: Use array for gamerule storage
+ private static int lastGameRuleIndex = 0;
+ public final int gameRuleIndex = lastGameRuleIndex++;
+ // Paper end - Perf: Use array for gamerule storage
final String id;
private final GameRules.Category category;