I think it was Chandler Carruth who said "If you're not measuring, then you don't care about performance." I agree, and by that measure, nobody I've ever worke

I think it was Chandler Carruth who said "If you're not measuring, then you don't care about performance." I agree, and by that measure, nobody I've ever worked with cares about performance. The best I'll see is somebody who cooked up a naive microbenchmark to show that style 1 takes fewer wall nanoseconds than style 2 on his laptop. People I've worked with don't use profilers, claiming that they can't trust it. Really they just can't be bothered to run it and interpret the output. The truth is, most of us don't write C++ because of performance; we write C++ because that's the language the code is written in. The performance gained by different C++ techniques seldom matters, and when it does you have to measure. Profiler reports almost always surprise me the first few times -- your mental model of what's going on and what matters is probably wrong.