frame interval and drawing time

sorry I could not find this information in the docs - what are reasonable values for frame interval and drawing time? If this is the average frame interval and drawing time I would guess I'd want "frame interval" < 16ms and "drawing time" even less than that?

However I sometimes see frame interval up to 33 ms, and drawing time even up to 48. Is this because this representing the maximum during the trial?

Should I be really worried about this?

Thanks!

Those two fields show the worst case (i.e., the maximum) during a trial, which mostly occurs at the very first frame of the first scene.If significant delays occur for the rest of a scene, a skipped frame warning will be displayed in the user text panel.