polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- `from_pandas` incorrectly handles object columns in some cases
- Improve `.cast` error message (add count/unique & format)
- add arithmetic optimization/simplification
- Add physical plan to `explain`'s
- Sortedness info for multiple sorted columns on DataFrames is not stored
- Rename `returns_scalar` in `map_groups` to something like `force_list_output`, or remove it entirely
- Replacing a value with null across many columns is very slow in a lazyframe
- column series cannot be written if it is contains items that are list of nested struct
- The new schema argument in *_csv methods seems still allow partial overwrites and schema inference?
- qcut throw PanicException when all None or nan
- Docs
- Rust not yet supported