On Wed, 27 Dec 2023, 11:33 Taras Sich via Gcc-help, <gcc-help@gcc.gnu.org>
wrote:

> Dear GCC team,
>
> Could you please clarify whether the implementation of std::launch::async
> uses a thread pool?
>

It does not, because that's not conforming. The standard says the function
has to be run in a new thread, not a reused one. The difference is
observable by using thread-specific variables.



I'm particularly interested in the implementation for Fedora 33.
> Have not found the behavior description in the documentation.
>
> Best regards,
> Taras
>