Simply calling fork() in the compiler was my favorite response so far. If the world moves towards import std; everywhere I think the case for that becomes compelling.

Again, my original point on this mailing list was just that there is a cost to adding more and more to the same headers with every version of the standard. I provided this benchmarking data because I was asked and I am also interested in experimenting with the latest C++ features.

I still feel strongly about having instantaneous build times, but not everyone has to agree. Just for comparison my non-allocating stripped down version of the standard loads as a module and creates a simple object output in 16ms instead of 50ms. And that module has twice as much functionality as I would ever use.