Julia also sets an env var JULIA_NUM_THREADS to 4. I’m just guessing what that means... the Python code is painfully unoptimised, the Julia one has plenty of inclining, uses native vector types vs naked lists etc.

I feel like Julia, faster though it seems to be, has a massive chip on the shoulder, keeps proving its erm performance is bigger than everyone else.

On the benchmarks where Julia is faster, it’s time is in bold. On the one regex one where Python happens to be faster, no bold. I guess outliers can be gleaned over.