5 ms·Except you can have thousands of std::async threads, and at best a few dozen std::threads.by candiodari 4y agoExcept you can have thousands of std::async threads, and at best a few dozen std::threads.synergy20 4y agoIt does not scale per the youtube talk though, the promises/futures are competing with shared resource, which is a surprise.jcelerier 4y agoThat's only if the implementation uses a thread pool, I think only MSVC does it, not libstdc++ or libc++ last time I checked