Ah, I loved coroutines. Combining this with Boost.ASIO and Boost.Beast, you can make a high-performance HTTP server/client in C++ quickly while defeating the competitors several margins far away.

Sadly, coroutine TS in Boost.ASIO is still a preview feature, and I've met a lot of quirks that stopped me forwarding from using it, for example, sockets have to be moved even inside a lambda, that can clearly optimized out by referencing, and I had some frustration of this.

Do you have any benchmark to back this assertion by any chance ?

The only benchmark I know of is https://www.techempower.com/benchmarks/ which is really poorly done but it's better than nothing. Rust seems to sometimes come first and C++ framework are close (and not by several margins).