Remove wall-time / unused skip tick protection (#11412)
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.
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794 changed files with 402 additions and 282 deletions
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patches/server/0698-Add-PlayerStopUsingItemEvent.patch
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patches/server/0698-Add-PlayerStopUsingItemEvent.patch
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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: u9g <git@u9g.dev>
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Date: Tue, 3 May 2022 20:41:37 -0400
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Subject: [PATCH] Add PlayerStopUsingItemEvent
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diff --git a/src/main/java/net/minecraft/world/entity/LivingEntity.java b/src/main/java/net/minecraft/world/entity/LivingEntity.java
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index 01a6e91f1b8f619e99d9bccde12f6e91e6ab5eb8..5383d231748f2d30b2f2bf3ce07d3667e4d828e9 100644
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--- a/src/main/java/net/minecraft/world/entity/LivingEntity.java
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+++ b/src/main/java/net/minecraft/world/entity/LivingEntity.java
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@@ -4076,6 +4076,7 @@ public abstract class LivingEntity extends Entity implements Attackable {
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public void releaseUsingItem() {
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if (!this.useItem.isEmpty()) {
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+ if (this instanceof ServerPlayer) new io.papermc.paper.event.player.PlayerStopUsingItemEvent((Player) getBukkitEntity(), useItem.asBukkitMirror(), getTicksUsingItem()).callEvent(); // Paper - Add PlayerStopUsingItemEvent
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this.useItem.releaseUsing(this.level(), this, this.getUseItemRemainingTicks());
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if (this.useItem.useOnRelease()) {
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this.updatingUsingItem();
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