G-WAN
G-WAN is closed-source web application server (not a language like Go). If I'm not mistaken G-WAN caches GET request, so second hit within few ms won't execute the backend function, practically this is cheating for benchmark (not merged), but for real application this feature quite great (can cope up with DDOS attack) :3 Btw did I mention that this web application server support whole lot of language? asm, C, C++, C#, D, Go, Java, Javascript, Lua, Objective-C, Perl, PHP, Python, Ruby, and Scala with CGI-like writing. One note that you must really learn how HTTP works (parsing header, setting cookie, parsing POST parameters, etc) if you want to use this.
I don't really know if this suffer the same problem similar to others that use CGI instead of FastCGI: connection pooling to database (but we can use pgpool).
LWAN
LWAN is also web application server that uses C, can be used with LuaJIT (fast implementation of Lua). For the framework you can use Sailor (Example).
PyParallel
PyParallel is a programming language implementation, forked from Python3, removes GIL (Global Interpreter Lock).
Julia is one awesome programming language that uses LLVM, it focuses
Actually there's a lot more implementation that faster than Go for certain (or all) cases, such as: C, C++, Ada, Rust, Java, and Fortran, be sure to check on BenchmarkGame site.
But, don't choose a language or web framework or web application platform just based on performance, there's a lot of things to consider, for example:
- either it's waste of time to work with (since you must do many things manually aka there's no framework or so little libraries/function yet)
- how easy it's to train a new programmer to work with you or continue the project
- what's the continuity of the technology (if the project abandoned by the author/maintainer)
- build/compile duration
- etc..
