The last paragraph mentions that Cloudflare uses LuaJIT (and C++ Aho-Corasick).

Cloudflare uses the OpenResty web server (Nginx+LuaJIT), that's quite interesting: http://blog.cloudflare.com/pushing-nginx-to-its-limit-with-l.... OpenResty is one of the top performing web servers in this well known benchmark: http://www.techempower.com/benchmarks/ , http://openresty.org/