I have been shipping features for weeks without ever measuring any of them. So I plugged the phone in and actually timed things, and the Upcoming screen I added last week turned out to fire eight calendar requests one after another. One slow week took 3.2 seconds and the other seven just sat in the queue behind it. Sending them four at a time took the whole thing from 3987ms to 297ms. Then while I was reading the log I noticed every haptic in the app has been throwing an exception instead of vibrating, because I gave Android an amplitude list of the wrong length in all seven places, so vibration has never once worked.