You have basically written datacenter software for a decade that may be a few orders of magnitude slower or more inefficient than it needed to be. pthreads is n

You have basically written datacenter software for a decade that may be a few orders of magnitude slower or more inefficient than it needed to be. pthreads is not fibers. Context switching between fibers can be extraordinarily fast because the kernel is not involved. I have some experience in the matter.