polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- unique() peak RSS is ~2× a dup-only rewrite when cardinality ≈ n_rows
- `LazyFrame.profile()` is not in removed-attribute map in 2.0
- `LazyFrame`/`Expr` still only warn for renamed parameters `DataFrame` hard-removed in 2.0
- fix: Preserve interruptible syscalls when registering the SIGINT handler
- select/with_columns/agg accept only a sole iterable positional argument, but the signature permits several
- Add SQL functions for current date/time
- `LazyFrame.show_graph()` does not yet default to `streaming` in 2.0
- Add 'encoding' kwarg to write_csv
- DatetimeChunked::from_naive_datetime panics on out-of-range nanosecond datetime
- `pl.repeat(...)` is an order of magnitude slower in comparison to `pl.Series(np.full(...))` for small inputs
- Docs
- Rust not yet supported