Idle Time spike when NavigationAgent is present

[gramozilho]

Godot version

3.5.beta2 and 3.5.beta4

System information

Windows 10, GLES3, NVIDIA GeForce RTX 2070 Super

Issue description

If a NavigationAgent is a child of NavigationMeshInstance there is noticeable lag even when not in use.
Profiler shows a big spike in Idle Time not coming from any script function. Removing the NavigationAgent and running the scene again removes the spike.

Happens with or without baked NavMesh.
Moving the NavigationAgent somewhere else also removes the spike.
Issue spotted when adding a NavigationAgent node to a RigidBody in character mode to move to a destination (3.4.beta2)

Steps to reproduce

Add a Navigation node, a NavigationMeshInstance as child and a NavigationAgent as child of that.
Run with the Profiler on.
Running the same scene without the NavigationAgent

Minimal reproduction project

Both Main (scene with valid NavMesh) and MinimumTest (just the 3 nodes mentioned above).

NavigationIdleTimeExample.zip

[akien-mga]

This might be a duplicate of #56838 which was fixed recently. The fix will be included in 3.5 beta 5.

Could you test latest CI builds from the 3.x branch to confirm? https://github.com/godotengine/godot/actions/runs/2244474520
Alternatively if you can build 3.x from source, that would work too.

[gramozilho]

@akien-mga yes, the problem is gone after building from source. Closing the issue then.