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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.
21 lines
1.5 KiB
Diff
21 lines
1.5 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: mja00 <me@mja00.dev>
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Date: Mon, 12 Aug 2024 06:27:15 -0400
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Subject: [PATCH] Add skipping world symlink scan
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In worlds that are extremely large (greater than 1TB), it can take an insanely long time to walk the entire world for symlinks.
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This patch adds a system property to disable the symlink scan, which can be used to speed up world loading.
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diff --git a/src/main/java/net/minecraft/world/level/storage/LevelStorageSource.java b/src/main/java/net/minecraft/world/level/storage/LevelStorageSource.java
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index 427ee4d6f12a7abd8da0c65e0b9081b25824df40..85ba843ce7e1f62971e736fa2cc028c47b274ce4 100644
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--- a/src/main/java/net/minecraft/world/level/storage/LevelStorageSource.java
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+++ b/src/main/java/net/minecraft/world/level/storage/LevelStorageSource.java
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@@ -420,7 +420,7 @@ public class LevelStorageSource {
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public LevelStorageSource.LevelStorageAccess validateAndCreateAccess(String s, ResourceKey<LevelStem> dimensionType) throws IOException, ContentValidationException { // CraftBukkit
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Path path = this.getLevelPath(s);
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- List<ForbiddenSymlinkInfo> list = this.worldDirValidator.validateDirectory(path, true);
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+ List<ForbiddenSymlinkInfo> list = Boolean.getBoolean("paper.disableWorldSymlinkValidation") ? List.of() : this.worldDirValidator.validateDirectory(path, true); // Paper - add skipping of symlinks scan
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if (!list.isEmpty()) {
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throw new ContentValidationException(path, list);
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