You should take your own advice, because have no clue what a context switch even is. P.S. C++ async is entirely about running on embedded hardware, not about "

You should take your own advice, because have no clue what a context switch even is. P.S. C++ async is entirely about running on embedded hardware, not about "overhead". P.P.S. All garbage-collected languages have a GIL of some sort. This is the real reason GC languages aren't used in systems programming, not GC pauses.