polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- RFC: DataType expressions
- 2× CSV Parsing performance regression introduced after version 1.10.0
- Error: `DSL_SCHEMA_HASH` is not compatible, can't deserialize DSL with incompatible schema
- Significant slowdown in conversion from arrow with categoricals post 1.32.0
- Rare S3 `scan_parquet` deadlock
- Polars - Discard option in scan_parquet
- sink_csv writes empty CSV after first iteration
- Enhancement: Support sorting by multiple columns in Expr.rank
- Optimize infer_schema_length in pl.Dataframe. 100 can lead to silently lost columns for no reason.
- `head(n)` and `tail(n)` fails for negative `n` for expressions and aggregation context
- Docs
- Rust not yet supported