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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.
56 lines
2.1 KiB
Diff
56 lines
2.1 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Andrew Steinborn <git@steinborn.me>
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Date: Mon, 18 Jan 2021 20:45:25 -0500
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Subject: [PATCH] Inline shift direction fields
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Removes a layer of indirection for EnumDirection.getAdjacent(X|Y|Z)(), which is in the
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critical section for much of the server, including the lighting engine.
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diff --git a/src/main/java/net/minecraft/core/Direction.java b/src/main/java/net/minecraft/core/Direction.java
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index c47e6acbd36737aa7af13b452f51b3f017d324f4..03c45ee77276462818a6f774b5945b25924aa3f0 100644
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--- a/src/main/java/net/minecraft/core/Direction.java
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+++ b/src/main/java/net/minecraft/core/Direction.java
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@@ -55,6 +55,12 @@ public enum Direction implements StringRepresentable {
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.sorted(Comparator.comparingInt(direction -> direction.data2d))
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.toArray(Direction[]::new);
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+ // Paper start - Perf: Inline shift direction fields
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+ private final int adjX;
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+ private final int adjY;
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+ private final int adjZ;
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+ // Paper end - Perf: Inline shift direction fields
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+
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private Direction(
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final int id,
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final int idOpposite,
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@@ -71,6 +77,11 @@ public enum Direction implements StringRepresentable {
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this.axis = axis;
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this.axisDirection = direction;
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this.normal = vector;
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+ // Paper start - Perf: Inline shift direction fields
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+ this.adjX = vector.getX();
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+ this.adjY = vector.getY();
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+ this.adjZ = vector.getZ();
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+ // Paper end - Perf: Inline shift direction fields
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}
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public static Direction[] orderedByNearest(Entity entity) {
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@@ -234,15 +245,15 @@ public enum Direction implements StringRepresentable {
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}
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public int getStepX() {
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- return this.normal.getX();
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+ return this.adjX; // Paper - Perf: Inline shift direction fields
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}
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public int getStepY() {
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- return this.normal.getY();
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+ return this.adjY; // Paper - Perf: Inline shift direction fields
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}
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public int getStepZ() {
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- return this.normal.getZ();
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+ return this.adjZ; // Paper - Perf: Inline shift direction fields
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}
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public Vector3f step() {
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