I don't think the advantage here is so much that Nim is fast, as Python is slow. If you're willing to dump Python you have many compiled language options, but I'll pick two: C and Rust.

For the kind of tasks the author outlines, I'd use AI. It excels at this: these are really simple, well-defined tasks it won't screw up.

So what I would do is pick a faster language - I'd pick Rust - then ask AI to script it and then repeat for as many tasks as you need.