polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- `DataFrame.select` preserves height when no columns are selected
- Binary sum aggregation results in null value
- Inconsistent behavior of `Expr.arr.get()` on null arrays.
- Add fallback value for *_horizontal if columns do not exist
- feat: Add `mean_horizontal` for temporals
- Serialization/Deserialization per-Row with `serde` trait
- Increased memory usaged regression when switching from `with_context` to `concat`
- `sink_csv` writes empty CSV when reading/writing to same file path.
- sink_parquet on LazyFrame constructed from Python IO plugin source
- Consider using Jiff instead of Chrono
- Docs
- Rust not yet supported