polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- `pd.Timestamp` loses `ns` precision and can underflow when ingested into Polars
- `pl.repeat(...)` is an order of magnitude slower in comparison to `pl.Series(np.full(...))` for small inputs
- fix(rust): Only enable DynamicPred in streaming engine
- feat: Add `maintain_order` to top-k expressions
- Datatypes have an inconsistent repr (not PEP 585-complaint?)
- `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
- Docs
- Rust not yet supported