Howto:Use the system monitor: Difference between revisions

In a perfect world, min/max/mean values should be almost identical for every subsystem - and standard deviation should be almost 0. Larger differences / high standard deviations result in a sloppy simulation and stuttering movements, though they'll hardly influence the frames-per-second value at all.

Also, imagine a system producing 100 frames in 0.5 seconds, then blocking completely for another 0.5 seconds. The fps display would still show "100fps", which seems great. But the 0.5 second stutter cause the visual performance to be terrible. That's why I prefer to display "(worst-case) frame spacing" instead of fps (View => Display Options => Show frame spacing). The frame spacing for the previous example would show "500ms", while a system producing 100 frames with perfectly even spacing would show "10ms".