polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- feat: Allow named column references in `eval` expressions
- `read_json` silently drops offset, unlike `read_csv`
- fix: Disallow rolling functions negative weights
- Rolling computes the wrong window when offset is not the negation of period (in-memory engine)
- perf: when loading DataFrame from iterable, chunk_size can be determined more optimally
- fix: Prevent datetime overflow
- refactor(python): Use `LazyFrameResolver` API for `scan_delta`
- #28498 feeds fabricated nulls to user code, so a null-free query can fail
- fix(rust): Centralize FixedSizeList outer-to-child layout arithmetic and fix under-reservation
- fix(python): Leave stream position at end of stream in `read_ipc_stream`
- Docs
- Rust not yet supported