[ohmahjong]

It's much more noticeable when running locally. Going from something like black + pylint + mypy running in a pre-commit hook to black + ruff + mypy has been wonderful for me.

It lets me actually set up another terminal session to run ruff on every file change - where pylint would take seconds, ruff is essentially instant.

Side note: I really hope mypy can get the same treatment; it runs quickly once its cache is established, but it's terribly slow running from scratch.

[davidhalter]

I'm currently speeding up Mypy + Jedi in Rust. I'm pretty far already and it's definitely a lot faster. Tests are currently running 500 times faster than Mypy.

[mixmastamyk]

These don't have to be run on every file in the repo, only the ones that have changed. At least not often. If it takes seconds, there is something wrong.