In Kotlin for instance you can run your coroutines with different "dispatchers", which have different behaviors. You can for instance use a dispatcher with multiple threads in a threadpool, run it in the main thread, a specific thread, in threads with low/high priority etc. Basically allowing you to write code using the async/coroutine paradigm, but then control its execution from the outside.

> In Kotlin for instance you can execute your coroutines with different "dispatchers", which have different behaviors. You can for instance use a dispatcher with multiple threads in a threadpool, run it in the main thread, a specific thread, in threads with low/high priority etc. Basically allowing you to write code using the async/coroutine paradigm, but then control its execution from the outside.

I'm not very experienced with Kotlin, but that sounds similar to python's run_in_executor [1]

[1] https://docs.python.org/3/library/asyncio-eventloop.html#asy...

Look at seastar.io which is an async concurrency library for C++. It is painful in that it resembles node.js but it is very performant. I'd be interested in seeing a version adapted to use C++20 coroutines.