Sat 19 Jun 2021 08:43:44 PM PDT I tried nuitka with this. It seemed pretty close to CPython in performance. It also had no way of identifying itself to itself; it looks like CPython at runtime, even in the sys module. It does have a __compiled__ boolean, but that's kind of a poor way to check if it's nuitka, as most Python's are technically compiled, if not more than technically.