About the time I need to take a dump, fix a sandwich and open a beer before editing Honestly, no idea, I never thought about it.
In this video when she walks over the bridge the AF was on and at 1:22 when I lift my Coffey cup it automatically rack focuses to hers. All shot with the 30mm pancake. https://www.youtube.com/watch?v=YeReub7OQbQ