It's not exactly about refreshing 60 times per second, but actually, not hanging the main thread for more than 16ms at a time. That means it _could_ do 60fps if

It's not exactly about refreshing 60 times per second, but actually, not hanging the main thread for more than 16ms at a time. That means it _could_ do 60fps if the user performs actions fast enough, not that it will actually update 60 times per second while idle.