He optimizes stuff he thinks is expensive and then runs the profiler to see what's expensive and then ends up saying "If you don't know what things cost, you ar

He optimizes stuff he thinks is expensive and then runs the profiler to see what's expensive and then ends up saying "If you don't know what things cost, you are lost." Seems someone needs to take their own advice. Based on the slides, did not have the patience to wait 10 minutes for the vimeo video to load.