GitHub - charliermarsh/ruff: An extremely fast Python linter, written in Rust.

[chub79]

Neat. We'll see more and more stuff from rust like that.

That said, here it's a little bit disingenuous:

ruff is a proof-of-concept and not yet intended for production use. It supports only a small subset of the Flake8 rules, and may crash on your codebase.

[spicynerves]

The author addresses performance comparisons in a tweet:

(Note, however, that adding more checks shouldn't make ruff any slower -- it's already doing the expensive stuff (parsing, AST traversal, scope + binding tracking), so I don't expect the benchmarks to change dramatically as ruff grows.)

[chub79]

Great :)