polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- What is the input-length contract for elementwise UDFs and expression plugins?"
- perf: Skip the expression engine for eager `repeat` with scalar literals
- `pd.Timestamp` loses `ns` precision and can underflow when ingested into Polars
- feat: Add `maintain_order` to top-k expressions
- `Categorical.sort()` is slower than the equivalent `String.sort()` since the 1.32 lexical rework
- docs(python): Direct filter users to semi joins
- `scan_csv` can fail if first row is too long
- fix: Prevent CSE from sharing scalar aggs in group_by()
- feat: Add `ntile` window function Expression
- fix: Retain CSV datetime parser state across fallback formats
- Docs
- Rust not yet supported