mirror of
https://github.com/PaperMC/Paper.git
synced 2024-12-03 05:26:50 +01:00
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.
47 lines
2.1 KiB
Diff
47 lines
2.1 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
|
|
From: Aikar <aikar@aikar.co>
|
|
Date: Thu, 3 Mar 2016 02:02:07 -0600
|
|
Subject: [PATCH] Optimize Pathfinding
|
|
|
|
Prevents pathfinding from spamming failures for things such as
|
|
arrow attacks.
|
|
|
|
diff --git a/src/main/java/net/minecraft/world/entity/ai/navigation/PathNavigation.java b/src/main/java/net/minecraft/world/entity/ai/navigation/PathNavigation.java
|
|
index 188904c9f0f81db1d63eec953d6746f2dc23dc81..2e9991e6b3c05584002744a2ee2579b1dba218b2 100644
|
|
--- a/src/main/java/net/minecraft/world/entity/ai/navigation/PathNavigation.java
|
|
+++ b/src/main/java/net/minecraft/world/entity/ai/navigation/PathNavigation.java
|
|
@@ -192,13 +192,33 @@ public abstract class PathNavigation {
|
|
return this.moveTo(this.createPath(x, y, z, 1), speed);
|
|
}
|
|
|
|
+ // Paper start - Perf: Optimise pathfinding
|
|
+ private int lastFailure = 0;
|
|
+ private int pathfindFailures = 0;
|
|
+ // Paper end - Perf: Optimise pathfinding
|
|
+
|
|
public boolean moveTo(double x, double y, double z, int distance, double speed) {
|
|
return this.moveTo(this.createPath(x, y, z, distance), speed);
|
|
}
|
|
|
|
public boolean moveTo(Entity entity, double speed) {
|
|
+ // Paper start - Perf: Optimise pathfinding
|
|
+ if (this.pathfindFailures > 10 && this.path == null && net.minecraft.server.MinecraftServer.currentTick < this.lastFailure + 40) {
|
|
+ return false;
|
|
+ }
|
|
+ // Paper end - Perf: Optimise pathfinding
|
|
Path path = this.createPath(entity, 1);
|
|
- return path != null && this.moveTo(path, speed);
|
|
+ // Paper start - Perf: Optimise pathfinding
|
|
+ if (path != null && this.moveTo(path, speed)) {
|
|
+ this.lastFailure = 0;
|
|
+ this.pathfindFailures = 0;
|
|
+ return true;
|
|
+ } else {
|
|
+ this.pathfindFailures++;
|
|
+ this.lastFailure = net.minecraft.server.MinecraftServer.currentTick;
|
|
+ return false;
|
|
+ }
|
|
+ // Paper end - Perf: Optimise pathfinding
|
|
}
|
|
|
|
public boolean moveTo(@Nullable Path path, double speed) {
|