VR.WaitForGPU lag UNLESS camera is selected in editor

Questions & Answers
1

I’m getting giant, regular spikes of “VR.WaitForGPU” - but ONLY when the active camera isn’t selected in the hierarchy. If I simply select the camera, my FPS goes from 60-100 up to 200.

I’m running 5.4f1 with a Vive.

2

Side note - the issue persists upon building. Is there some way to tell Unity to act as if the camera is selected, at runtime?

3

Getting the same thing… the spikes are about 16ms.
I had not noticed that selecting the camera makes a difference, good catch:)

What could be going on here?

4

Yeah this is crazy, I get it too.
I hadn’t noticed the same lag building though, like mgc mentioned.

To make the issue less annoying (certainly not a fix)
I whipped up a script to select the camera whenever you press play
(just attach to your camera eye object)

using UnityEngine;
#if DEBUG
using UnityEditor;
#endif

//attach this to the object you want to become selected when 'Play' is pressed in the editor
//purpose: to fix the Unity/VR bug where framerate tanks if camera eye isn't selected
public class SelectedOnPlay : MonoBehaviour {

	#if DEBUG
	SelectedOnPlay() {
		EditorApplication.playmodeStateChanged = HandleOnPlayModeChanged;
	}

	void HandleOnPlayModeChanged()
	{
		if (EditorApplication.isPlaying)
		{
			//select this object
			if(Selection.activeObject != gameObject)
				Selection.activeObject = gameObject; 
		}
	}
	#endif
}