Oh, nice, I will definitely try that. Nifs in C are an eyesore and a risk, having more language options there is good and a clean integration like this is even better.
Just FYI I recommend waiting till I 0.1 it, which will definitely happen before end of January, when I'm giving a talk. I haven't tested that it works as a library yet, much less with elixir releases (it works self contained).