The frame time thing is interesting.
If I disable v-sync just running around Oribos with some players around I get about 180-250 FPS. In quiet, smaller areas I can get about 350-400 FPS.
So let’s even say 200 FPS average. That’s a 5ms frame time.
When the stutter occurs it looks to be maybe a 0.1 or 0.2 secs pause, but let’s call it just 0.1 secs or 100ms. So it’s not just dropping a few frames as you might occasionally expect, it’s dropping somewhere around 20 frames, that’s crazy.
If I lock my FPS as low as 40 the game is still generally running more smoothly than when the stutter occurs, so I’m sure the in game FPS display isn’t even properly showing the stutter frames loss when it only dips by a few frames each time the stutter occurs.