import time fps = 5 time_delta = 1./fps while True: t0 = time.clock() time.sleep(time_delta) t1 = time.clock() print 1. / (t1 - t0) What is your OS and what is the result of this simple mesure ? If it's about cleaning your code, I would separate more clearly the FPS evaluation , the processing and the sleep call . Nov 04, 2016 · Hi there, I have an iPhone 5s that's gone into a boot loop. It won't go into safe mode and force restarting isn't helping. Unfortunately my memory is full and I'm two software updates behind (haven't had time to clear things out - new job etc) and I think it was iTunes that crashed.