polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- Passive HTTP rate-limiter until first 503
- Optimize Int8/UInt8 arr.dot reduction
- feat(python): Add extra_columns parameter to scan_ipc
- scan_delta(DeltaTable) fails when DeltaTable uses delta-rs string storage_options (max_retries type mismatch)
- Implement a parallel cumulative sum streaming node
- Add support for parquet ALP encoding
- POLARS_MAX_THREADS=1 slower with subprocess since 1.42.0
- perf: Skip the expression engine for eager `repeat` with scalar literals
- `pd.Timestamp` loses `ns` precision and can underflow when ingested into Polars
- `collect_async` and `collect_batches` silently run on the CPU when GPU is selected
- Docs
- Rust not yet supported