Ah interesting, thanks for checking. Not entirely sure I understand where the waits were happening, but my guess here is that the way Microsoft intended listening to work is for a new pipe listener to be spawned (if desired) once an existing one connects to a client. That way you don't spawn 8 ahead of time, you spawn 1 and then count up to 8.

I would intuitively expect throughout (once all clients have connected) to be similar to on Linux, unless the Linux side uses syscalls like vmsplice() - but not sure, I've never tried benchmarking.