Paper/patches/unapplied/server/0357-Optimize-Pathfinding.patch

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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 25a9f1fd69fbafab5129740e26e9741e35885ce0..e3a7eaf31ab19cc9f23a0c87649b74bb42976cb4 100644
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--- a/src/main/java/net/minecraft/world/entity/ai/navigation/PathNavigation.java
+++ b/src/main/java/net/minecraft/world/entity/ai/navigation/PathNavigation.java
@@ -192,9 +192,29 @@ public abstract class PathNavigation {
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return this.moveTo(this.createPath(x, y, z, 1), speed);
}
+ // Paper start - Perf: Optimise pathfinding
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+ private int lastFailure = 0;
+ private int pathfindFailures = 0;
+ // Paper end - Perf: Optimise pathfinding
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+
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) {
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+ 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)) {
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+ this.lastFailure = 0;
+ this.pathfindFailures = 0;
+ return true;
+ } else {
+ this.pathfindFailures++;
+ this.lastFailure = net.minecraft.server.MinecraftServer.currentTick;
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+ return false;
+ }
+ // Paper end - Perf: Optimise pathfinding
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}
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public boolean moveTo(@Nullable Path path, double speed) {