that's just nonsense. there are many people very concerned about performance. i guess you are right that some do not care about constant factors, but i am very

that's just nonsense. there are many people very concerned about performance. i guess you are right that some do not care about constant factors, but i am very sure most do care about algorithmic complexity. and thinking about it, that's the approach you should use for anything where every last bit of performance is not utterly needed.