Hmm.. I've tried luaJit module and I've given up half way when building as it seemed a lot of compatibility issue(maybe not professional enough to build), sincerely I don't know lua and I prefer go for c module over any other language mixed together since nginx is build from C

For nginx-c-function, it's easy build and I can build this as dynamic module and use it with other servers which has same version of nginx.

It might be good to use lua if the person not good in c/c++.