true, i saw a thread recently on reddit where guy hand-tuned compilation flags and did pgo profiling for a video encoder app that he uses on video encode farm.

true, i saw a thread recently on reddit where guy hand-tuned compilation flags and did pgo profiling for a video encoder app that he uses on video encode farm. In his case, even a gain of ~20% was significant. It calculated into extra bandwidth to encode a few thousand more video files per year.