polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- Support collections of expressions in `is_in`
- Support `by`/`by_left`/`by_right` arguments in `join_where`
- Use externally provided ressources (tokio runtime / rayon thread pool)
- Implement ewm_std_by, ewm_var_by
- `pl.read_ipc` is up to 10x slower when not using pyarrow
- Cannot call `.to_arrow()` on series on StructArray with offset
- Avro reader/writer cannot roundtrip sample foods1.csv
- In read_csv function, if use_pyarrow=True then comment_prefix is ignored
- Support read parquet in Oracle Cloud OCI
- Strange cast behavior of Series comparison operators
- Docs
- Rust not yet supported