I finished the select() backend for libeve Thus libeve can be compiled under nearly every operating system in this solar system (I didn't even tried it, but the functional components are ready). Primary focus was and is Linux, I am not necessarily interested in other systems. Under Linux epoll/timer_fd is the best what you can do if you want to do. Under {Free, Net, Open, ...}BSD kqueue should be the most performant implementation, but doe to lack of time and interest it isn't implemented and select() should be fine too.

Some analysis draw another picture on the wall:

images/epoll.png

The good value for select() are a little bit misleading: epoll _will_ outperform select and poll if a sub-set of descriptors are ready. The presented test here make _all_ descriptors in the set readable. So the negative performance impact is caused due to massive context switched (e.g. each context switch for epoll() to get information, where the select() set is already set with one system call). Increasing the EVE_EPOLL_ARRAY_SIZE should relax the context switch overhead (currently 64).