polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- str.to_integer rejects leading/trailing whitespace while python int() and pandas accept (' 1' → null)
- Introduce `target_file_size` for partitioned sinks
- User guide links to a Great Tables page that 404s (articles/intro.html)
- docs(python): Point the Great Tables link at the page that exists
- PlRefPath should implement TryFrom for Path and PathBuf
- `from_pandas(include_index=True)` names an unnamed index column `'None'` (and unnamed MultiIndexes raise a false "non-unique" error)
- Panic in cache_states when .cache() is the root of a query containing a shared subplan
- DataFrame.rolling produces incorrect result if window boundaries are not monotone
- scan_parquet combines naive and UTC datetime files without error; the time zone is dropped or applied depending on file order
- Support stateful, ordered streaming operators (plugins or lazy UDFs)
- Docs
- Rust not yet supported