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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.
41 lines
2.0 KiB
Diff
41 lines
2.0 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Owen1212055 <23108066+Owen1212055@users.noreply.github.com>
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Date: Sun, 14 May 2023 00:47:28 -0400
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Subject: [PATCH] Avoid Lazy Initialization for Enum Fields
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This patch is meant to get rid of any instances of lazy initialization that Minecraft introduces for enums.
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This has the possibility to create race condition issues, and generally don't make sense to be lazily done anyways.
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diff --git a/src/main/java/com/mojang/math/OctahedralGroup.java b/src/main/java/com/mojang/math/OctahedralGroup.java
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index 0a3b6b8e250bd35530c05a1cdaf2eb8a9af4c72b..9aa82fc757c67a9456b2bdec744c0cb474d64df6 100644
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--- a/src/main/java/com/mojang/math/OctahedralGroup.java
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+++ b/src/main/java/com/mojang/math/OctahedralGroup.java
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@@ -110,6 +110,7 @@ public enum OctahedralGroup implements StringRepresentable {
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this.permutation = axisTransformation;
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this.transformation = new Matrix3f().scaling(flipX ? -1.0F : 1.0F, flipY ? -1.0F : 1.0F, flipZ ? -1.0F : 1.0F);
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this.transformation.mul(axisTransformation.transformation());
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+ this.initializeRotationDirections(); // Paper - Avoid Lazy Initialization for Enum Fields
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}
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private BooleanList packInversions() {
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@@ -138,7 +139,7 @@ public enum OctahedralGroup implements StringRepresentable {
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return this.name;
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}
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- public Direction rotate(Direction direction) {
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+ public void initializeRotationDirections() { // Paper - Avoid Lazy Initialization for Enum Fields
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if (this.rotatedDirections == null) {
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this.rotatedDirections = Maps.newEnumMap(Direction.class);
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Direction.Axis[] axiss = Direction.Axis.values();
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@@ -153,6 +154,10 @@ public enum OctahedralGroup implements StringRepresentable {
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}
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}
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+ // Paper start - Avoid Lazy Initialization for Enum Fields
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+ }
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+ public Direction rotate(Direction direction) {
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+ // Paper end - Avoid Lazy Initialization for Enum Fields
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return this.rotatedDirections.get(direction);
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}
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