polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- Describe : add shortest, longest, avg/max/min length,field type etc..
- Inconsistent behaviour of `strict` for mixed data types dataframe creation
- High `struct` nesting levels get really slow
- Inconsistent `bitand` behavior between Series and expression contexts with UInt64/Int128
- Add support for initializing series from typed pandas arrays
- Adding timedelta to `datetime[ns]` casts away nanoseconds
- Add `extra_columns` parameter to all native scan functions and make default behavior consistent
- Add option to save ipc files with regular arrow string type instead of large_string
- `is_in` lowering in streaming `group_by` goes to in-memory map
- write_excel options
- Docs
- Rust not yet supported