polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- Unclear error message when passing unnamed elements in `pl.SQLContext()`
- Append on export
- Nested aggregations in `rolling` with `group_by` is slow and consumes a lot of memory
- Strange behavior of bool columns in dataframe
- API: inconsistent column expansion in group_by: `pl.col('a', 'b')` vs `pl.nth(0, 1)` vs `pl.all()`
- Loading the same file multiple times causes changes in values using polars, but not when using pandas
- Add python-like zip for list columns
- Polars' SIGINT handler sets `SA_RESTART` flag, preventing syscalls from being interrupted
- Allow forcing suffix on `.join()`
- Dataframe to_arrow causes silent rechunk
- Docs
- Rust not yet supported