I only have superficial experience with it, but from what I can tell there is a huge mismatch between IOCP and the UNIX readiness/poll model, and from my experience most server programs are written primarily for the latter.
You need to design your server code somewhat differently to take advantage of IOCP. What many UNIX-like softwares do instead is bend IOCP or WaitForMultipleObjects() to behave like Linux. It works, but the performance is not there.
Note that I haven't checked the code for any of the softwares in your chart so I could be wrong.
You need to design your server code somewhat differently to take advantage of IOCP. What many UNIX-like softwares do instead is bend IOCP or WaitForMultipleObjects() to behave like Linux. It works, but the performance is not there.
Note that I haven't checked the code for any of the softwares in your chart so I could be wrong.