Optimising software has frequently been very cargo cult-ish. No measurements at all or measurements that tell you nothing have been pretty common. It seems it's

Optimising software has frequently been very cargo cult-ish. No measurements at all or measurements that tell you nothing have been pretty common. It seems it's more common to take it seriously now, also tools are better and techniques get written up on blogs and shared, some of the good ones catch on, some of the bad ones eventually fall over. "If experiment doesn't match theory the theory is wrong." Feynman has been the source of a good bit of wisdom in my career and life. Re-post and re-discuss often. If you haven't, "Surely you're joking..." It's worth your time and will also entertain. I should read it again, it's been a while.