Arid started because Pylint R0801 was too slow. Version 2.0 keeps the fast detector and builds the workflows around it.
A few months ago, I had a fairly simple problem: Pylint was too slow.
I use Pylint's R0801 duplicate-code detection on Polaris, a fairly large Python project I've been building. I also use Ruff, which handles most of the Python linting I care about and handles it very quickly.
Unfortunately, Ruff doesn't detect duplicate code. So every time I wanted that one check, I was back to waiting for Pylint.
Eventually I got tired of waiting and built Arid, a focused Python duplicate-code checker written in Rust. The idea was deliberately simple: do the job I was using Pylint R0801 for, do it accurately, and do it fast enough that I wouldn't mind running it all the time.
