polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- SQL: when a table is created with SQL, it is created twice
- Column level lineage
- Json serialiation from DataFrame generates emtpy "[]" string
- not implemented for dtype Object("object")
- Lock files while scanning
- Faster join on multiple columns where one is sorted (already possible using `join_asof` with `tolerance=0`)
- Better explanation for low_memory
- `from_pandas` incorrectly handles object columns in some cases
- Improve `.cast` error message (add count/unique & format)
- add arithmetic optimization/simplification
- Docs
- Rust not yet supported