polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- #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`
- What is the input-length contract for elementwise UDFs and expression plugins?"
- perf: Skip the expression engine for eager `repeat` with scalar literals
- `pd.Timestamp` loses `ns` precision and can underflow when ingested into Polars
- `pl.repeat(...)` is an order of magnitude slower in comparison to `pl.Series(np.full(...))` for small inputs
- fix(rust): Only enable DynamicPred in streaming engine
- feat: Add `maintain_order` to top-k expressions
- Datatypes have an inconsistent repr (not PEP 585-complaint?)
- Docs
- Rust not yet supported