A large amount of my optimizations targeted worse case performance. As in reducing frame spikes for smoother game play. I don't care much for peak FPS. Who cares if sometimes you get 120 FPS, when most of the time you get 40 FPS and then randomly dropping to 10 FPS. I'll take 60 FPS most of the time.
Lathan did a lot of iteration and testers a lot of testing to get to 50 builds.