You're right, even if you're still running efficiently on all cores, it's still Python. I actually make this exact point in a separate presentation that I did

You're right, even if you're still running efficiently on all cores, it's still Python. I actually make this exact point in a separate presentation that I did a few weeks ago: https://speakerdeck.com/trent/parallelism-and-concurrency-with-python?slide=33 https://speakerdeck.com/trent/parallelism-and-concurrency-wi... Numba is one option -- rather than executing the CPython innards, have it switched out for an LLVM-optimized kernel instead.