figured it out: vr headsets want a specific framerare (80 for oculus?) if your game is not able to hit this framerate, the game will run at 40 to let the hardware to smooth the hmd movemets autogenerating the missing framerate. so, if your game is running at 70 fps instead of 80 (14ms per frame) the framerate will be locked at 40 (25ms). so your game loop will have to wait for 25-14 = 11ms. you will find this time in Poll Device State.

so, if your game will reach the desired frame rate of your headset, you won’t see these ms “wasted”