If you are keeping a collection of web servers, I’ve got a new one for you – rwasa ( emphasis mine ):
rwasa is our full-featured, high performance, scalable web server designed to compete with the likes of nginx. It has been built from the ground-up with no externel library dependencies entirely in x86_64 assembly language, and is the result of many years’ experience with high volume web environments. In addition to all of the common things you’d expect a modern web server to do, we also include assembly language function hooks ready-made to facilitate Rapid Web Application Server (in Assembler) development.
Yep, written in x86_64 assembly. Their performance tests show it competing nicely against Nginx. I didn’t see any mention of HTTP/2 support though.