Whenever we talks about App performance, we talks about app startup time most of the time. But there are various other metrics to measure app performance which are as importance as app startup time like app hang rate, scroll hitch rate, fps, memory consumption, bundle size, cpu ticks and much more. I will cover how to measure these, how to optimize these and why these are importance Let me share the small example of importance of bundle size. If app bundle size is more than 200MB then user will interrupted before downloading such app on cellular network.