iOS app performance

Excellent article on app performance and what you can do about it:

Measuring the startup time is really easy and can have a great impact on the user experience. I wouldn’t release an app with an extra thread to detect responsiveness issues on the main thread, but it is definitely a good idea in testing environment. It can point out some issues at an early stage. Collecting performance metrics from your users also seems a good idea to me.

Note: I didn’t mention anything about Instruments, because it is obvious you should use it regularly.