polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- collect_all asserts fail with group_by
- Categorical multi file parquet scan leads to OOM, low cardinality column seems to not skip row groups, unused categories after .collect()
- Schema as dataclasses
- Remove usage of mmap
- replace_strict shouldn't coerce numeric entries into strings
- Streaming engine cannot be build for `pyodide`
- fix(python): Fix LazyFrame.__contains__ not issuing PerformanceWarning
- Add implicit type conversion to `read_csv` instead of raising errors directly
- test(python): Add test for list slice input
- Allow skipping invalid json in `json_decode`
- Docs
- Rust not yet supported