If you want the super best performance, throughput and latency wise, and don't care about memory, then Apache prefork would be the way to go. Just make sure tha

If you want the super best performance, throughput and latency wise, and don't care about memory, then Apache prefork would be the way to go. Just make sure that Apache never needs to fork any new processes after startup. Usually, of course, there are tradeoffs. In those cases, Apache w/ Event MPM is just as scalable, efficient and concurrent as nginx. Just make sure you are running Apache httpd 2.4.x on a modern OS, to make use of the non-blocking and async I/O and event handling of Apache httpd.