With procentual factor / delta timing, you have just to make sure, that you "catch" 0 divisions and 0 like divisions which ends in infinite values or errors. If thats ensured, then they normally work great.
I even do procentual factor + timed rendering which gives me for fixed 60 FPS several 10000 mainloop runs for other usefull things than rendering or wait for rendering.
I even do procentual factor + timed rendering which gives me for fixed 60 FPS several 10000 mainloop runs for other usefull things than rendering or wait for rendering.