Does it claim better performance than CPython or PyPy? I can't quite find the reference to PyPy (after a quick scan of the page/github repo. It looks like a cool project! They seem to be doing a lot of optimizations, which they list on their github page https://github.com/kayhayen/Nuitka#optimization. It looks like the git repo was created ~2013 (I dunno if it was hosted/worked-on elsewhere prior to that) so they've had a few years to optimize. Cool project though!