Sadly it's not public but yes I was very happy to see how well LuaJIT with Nginx peformed for this problem set. I developed several solutions in C, C++, Java, Java+Zing, LuaJIT and Go. The Nginx/LuaJIT (openresty to be exact) solution had a great ratio of "approachable code" to "performance" factor. I was able to get it built and transfer its use to several other teams without them having to know C and still be able to make changes effectively.