I have several Recast graphs and each agent moves only along one of these graphs, for this I set up traversable graphs.
I encountered large performance spikes on the Repair/GetNearest marker when spawning a large number of agents. These spikes are not observed when the graph is single.
What I found about this:
When the agent is assigned the first destination and before the first computed path is received, the agent searches for the closest position with GraphMask.Everything.
This happens here:
at AstarPath.GetNearest (UnityEngine.Vector3 position, Pathfinding.NNConstraint constraint) [0x000f6] in .\Library\PackageCache\com.arongranberg.astar@5.1.6\Core\AstarPath.cs:2280
at Pathfinding.PathTracer.RepairFull (UnityEngine.Vector3 point, System.Boolean isStart, Pathfinding.PathTracer+RepairQuality quality, Pathfinding.Util.NativeMovementPlane movementPlane, Pathfinding.ITraversalProvider traversalProvider, Pathfinding.Path path) [0x002f5] in .\Library\PackageCache\com.arongranberg.astar@5.1.6\Utilities\PathTracer.cs:866
at Pathfinding.PathTracer.Repair (UnityEngine.Vector3 point, System.Boolean isStart, Pathfinding.PathTracer+RepairQuality quality, Pathfinding.Util.NativeMovementPlane movementPlane, Pathfinding.ITraversalProvider traversalProvider, Pathfinding.Path path, System.Boolean allowCache) [0x00262] in .\Library\PackageCache\com.arongranberg.astar@5.1.6\Utilities\PathTracer.cs:647
at Pathfinding.PathTracer.UpdateEnd (UnityEngine.Vector3 position, Pathfinding.PathTracer+RepairQuality quality, Pathfinding.Util.NativeMovementPlane movementPlane, Pathfinding.ITraversalProvider traversalProvider, Pathfinding.Path path) [0x00001] in .\Library\PackageCache\com.arongranberg.astar@5.1.6\Utilities\PathTracer.cs:317
at Pathfinding.ECS.JobRepairPath.Execute (Unity.Transforms.LocalTransform& transform, Pathfinding.ECS.MovementState& state, Pathfinding.ECS.AgentCylinderShape& shape, Pathfinding.ECS.AgentMovementPlane& movementPlane, Pathfinding.ECS.DestinationPoint& destination, Unity.Entities.EnabledRefRW`1[T] readyToTraverseOffMeshLink, Pathfinding.ECS.ManagedState managedState, Pathfinding.ECS.MovementSettings& settings, Unity.Collections.NativeList`1[T] nextCornersScratch, Unity.Collections.NativeArray`1[System.Int32]& indicesScratch, Unity.Collections.Allocator allocator, System.Boolean onlyApplyPendingPaths) [0x0009c] in .\Library\PackageCache\com.arongranberg.astar@5.1.6\Core\ECS\Jobs\JobRepairPath.cs:166
at Pathfinding.ECS.JobRepairPath.Execute (Unity.Entities.ArchetypeChunk& chunk, System.Int32 unfilteredChunkIndex, System.Boolean useEnabledMask, Unity.Burst.Intrinsics.v128& chunkEnabledMask) [0x00103] in .\Library\PackageCache\com.arongranberg.astar@5.1.6\Core\ECS\Jobs\JobRepairPath.cs:122
at Pathfinding.ECS.JobRepairPath.Unity.Entities.IJobChunk.Execute (Unity.Entities.ArchetypeChunk& chunk, System.Int32 unfilteredChunkIndex, System.Boolean useEnabledMask, Unity.Burst.Intrinsics.v128& chunkEnabledMask) [0x00000] in <18f1e63f002e4955adae22c3c0d33547>:0
at Unity.Entities.JobChunkExtensions+JobChunkProducer`1[T].ExecuteInternal (Unity.Entities.JobChunkExtensions+JobChunkWrapper`1[T]& jobWrapper, System.IntPtr bufferRangePatchData, Unity.Jobs.LowLevel.Unsafe.JobRanges& ranges, System.Int32 jobIndex) [0x0013f] in .\Library\PackageCache\com.unity.entities@1.2.3\Unity.Entities\IJobChunk.cs:420
at Unity.Entities.JobChunkExtensions+JobChunkProducer`1[T].Execute (Unity.Entities.JobChunkExtensions+JobChunkWrapper`1[T]& jobWrapper, System.IntPtr additionalPtr, System.IntPtr bufferRangePatchData, Unity.Jobs.LowLevel.Unsafe.JobRanges& ranges, System.Int32 jobIndex) [0x00001] in .\Library\PackageCache\com.unity.entities@1.2.3\Unity.Entities\IJobChunk.cs:363
Here’s how I workaround the problem:
Change PathTracer.nnConstraint.graphMask to the traversable graphs via reflection when creating an agent, because I did not find a public API for this. I would like to get rid of this reflection.
I use only Pathfinding.ECS and do not use FollowerEntity. So the stack trace for FollowerEntity may be different. But I have verified that the same problem exists with FollowerEntity.
