rs-0.55.2

mantinedev/mantiners-0.55.2Aug 6, 2026by github-actions[bot]

AI Summary

This is a patch release for the Rust Polars library featuring an adaptive HTTP rate-limiter and critical bug fixes, including an unsoundness issue in rayon.

Key Highlights

Add adaptive HTTP rate-limiter for cloud IO
Fix unsoundness in rayon block_on
Improve IR node equality checking in CSPE

New Features

Adaptive HTTP rate-limiter for cloud IO
Fix for unsoundness in rayon block_on
Improved IR node equality checking
Documentation update for arg_extremum functions

Full Release Notes

## ✨ Enhancements

- Add adaptive HTTP rate-limiter for cloud IO (#28591)

## 🐞 Bug fixes

- Unsoundness in rayon block\_on (#28709)
- Check for (shallow) IR node equality on top of hashing in CSPE (#28506)

## 📖 Documentation

- Document that arg\_extremum functions return any index on ties (#28691)

Thank you to all our contributors for making this release possible!
@dancsi, @dsprenkels, @kdn36, @orlp and @ritchie46