polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- Use pre-optimized query plan by benchmark LazyFrame for the evaluation of another LazyFrame
- Regression: Incorrect categorical encoding after sort
- Failing inner join with join_nulls=False on some hardware
- `pl.concat()` output with Expr input is wrong when using the new streaming engine
- Document copy-on-write logic
- refactor(rust): Add equi joins to new streaming engine
- Regression: Polars 1.14 doesn't accept AWS_S3_ALLOW_UNSAFE_RENAME anymore
- Invalid format specified when converting Time type with `to_string` causes panic
- Panic after join when dataframe has a column of dtype pl.Object and resulting dataframe has only one row
- DataFrame.sum slow for u8, u16, i8, i16
- Docs
- Rust not yet supported