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01a13871de
Patch documentation to come Issues with the old system that are fixed now: - World generation does not scale with cpu cores effectively. - Relies on the main thread for scheduling and maintaining chunk state, dropping chunk load/generate rates at lower tps. - Unreliable prioritisation of chunk gen/load calls that block the main thread. - Shutdown logic is utterly unreliable, as it has to wait for all chunks to unload - is it guaranteed that the chunk system is in a state on shutdown that it can reliably do this? Watchdog shutdown also typically failed due to thread checks, which is now resolved. - Saving of data is not unified (i.e can save chunk data without saving entity data, poses problems for desync if shutdown is really abnormal. - Entities are not loaded with chunks. This caused quite a bit of headache for Chunk#getEntities API, but now the new chunk system loads entities with chunks so that they are ready whenever the chunk loads in. Effectively brings the behavior back to 1.16 era, but still storing entities in their own separate regionfiles. The above list is not complete. The patch documentation will complete it. New chunk system hard relies on starlight and dataconverter, and most importantly the new concurrent utilities in ConcurrentUtil. Some of the old async chunk i/o interface (i.e the old file io thread reroutes _some_ calls to the new file io thread) is kept for plugin compat reasons. It will be removed in the next major version of minecraft. The old legacy chunk system patches have been moved to the removed folder in case we need them again.
44 lines
1.8 KiB
Diff
44 lines
1.8 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Aikar <aikar@aikar.co>
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Date: Thu, 3 Mar 2016 02:02:07 -0600
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Subject: [PATCH] Optimize Pathfinding
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Prevents pathfinding from spamming failures for things such as
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arrow attacks.
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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
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index 64cbff139ee8ccf5cdfe7c3d97fa69d8244becb2..c1781c92ff59f0c9eb47cbbef01e3252c5e1a1bf 100644
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--- a/src/main/java/net/minecraft/world/entity/ai/navigation/PathNavigation.java
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+++ b/src/main/java/net/minecraft/world/entity/ai/navigation/PathNavigation.java
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@@ -190,9 +190,29 @@ public abstract class PathNavigation {
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return this.moveTo(this.createPath(x, y, z, 1), speed);
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}
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+ // Paper start - optimise pathfinding
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+ private int lastFailure = 0;
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+ private int pathfindFailures = 0;
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+ // Paper end
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+
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public boolean moveTo(Entity entity, double speed) {
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+ // Paper start - Pathfinding optimizations
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+ if (this.pathfindFailures > 10 && this.path == null && net.minecraft.server.MinecraftServer.currentTick < this.lastFailure + 40) {
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+ return false;
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+ }
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+ // Paper end
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Path path = this.createPath(entity, 1);
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- return path != null && this.moveTo(path, speed);
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+ // Paper start - Pathfinding optimizations
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+ if (path != null && this.moveTo(path, speed)) {
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+ this.lastFailure = 0;
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+ this.pathfindFailures = 0;
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+ return true;
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+ } else {
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+ this.pathfindFailures++;
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+ this.lastFailure = net.minecraft.server.MinecraftServer.currentTick;
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+ return false;
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+ }
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+ // Paper end
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}
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public boolean moveTo(@Nullable Path path, double speed) {
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