polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- error[E0277]: the trait bound `ndarray::Dim<_>: ToNpyDims` is not satisfied
- ChunkedArray different chunk sizes performance
- Two nominally identical deltatables throw SchemaError when concatenated (Timestamp incompatibility)
- Could use less memory on aggregation?
- Deserialize breaks for empty dataframe with Array dtype
- Unable to write pyarrow parquet for List(Array(_)) with nulls
- [DOC]: Is it required that groupby key expressions are elementwise?
- Loading a LazyFrame pickle can be 10x slower than the equivalent eager DataFrame pickle
- Pass scan_parquet kwargs to scan_delta
- Parquet writer only writes one data page if it utilizes dictionary encoding
- Docs
- Rust not yet supported