[jeremiep]

Talks from Mike Acton and Scott Meyers, specifically "Data-Driven Development" and "CPU Caches and why you should care" respectively.

I forgot exactly where I got that number, but it's been a pretty good metric so far.

In a nutshell; the compiler is great a micro-optimizations and absolutely terrible at macro-optimizations. The former will get you a few percent of perf boosts while the later usually results in orders of magnitudes of performance gains.

Its near impossible to apply macro-optimizations at the end of a project without massive refactors.

[steveklabnik]

Cool, I'll check those out, thank you!

[Narishma]

I believe the 10/90 number may be from this talk, though I don't have time to rewatch it to confirm: https://www.youtube.com/watch?v=rX0ItVEVjHc