polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- Polars History server equivalent
- feat(python): Add frame-level `all_horizontal` / `any_horizontal`
- map_group sometimes can't deduce schema
- scan_parquet panics when file is bigger than 2^32 but materialized query isn't. duckdb and pyarrow can do query.
- Constructing columns with data type Array in rust
- feat(rust,python): Add quantiles method to expression list namespace
- `to_numpy()` is more memory intensive than `to_pandas()` with string or categorical columns
- When doing group_by_dynamic, cannot access "_upper_boundary" in map_groups function.
- PanicException when writing to Delta a Null value casted to a list of structs
- Support frame-level boolean operators (e.g. `df1 & df2`)
- Docs
- Rust not yet supported