I didn't say you shouldn't. I just asked how often that kind of performance optimization mattered. The world is not comprised only of CRUD and situations where

I didn't say you shouldn't. I just asked how often that kind of performance optimization mattered. The world is not comprised only of CRUD and situations where that kind of perf matters. But I do agree that even if you don't have to worry about cache latency for every single thing you write, it is something you should know about.