polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- read_ndjson / scan_ndjson silently drop a key first seen past infer_schema_length, while read_json raises on the same records
- docs: Expand on expression plugins and add section on using arrow extension types
- Add `pl.Series.show`
- Inexact `mean`/`median` for integer and temporal dtypes
- perf: Push down a semi join to reduce group-by inputs
- fix: Add broadcasting to pl.list() to handle mixed scalar/column inputs (fixes #29265)
- perf: Preserve rolling kernels after grouped row reorder
- Workspace feature system
- fix: Preserve timezone offsets when reading JSON datetimes
- feat: Recognize List evaluation over scalar values
- Docs
- Rust not yet supported