I am working on a project where full rebuild takes about an hour. Fortunately, we do not need to perform full rebuild often on our development machines so most

I am working on a project where full rebuild takes about an hour. Fortunately, we do not need to perform full rebuild often on our development machines so most of the time I can build with the changes I've made in between 10 secs to 5 minutes. I would expect this to be similar for other projects. Surely we care about build speed, but there is no need to care about such micro optimizations as qsort vs std::sort. Most of the speedup is in correctly separating translation units and not including unnecessary header files (sometimes forward declaration is enough for example...). With that said, when there are some tradeoffs then optimizing build speed is among one of the last things we care about.