polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- Surprisingly high Swap usage with `read_parquet` - much higher than eventual RAM usage
- apply doesn't work with groupby_dynamic
- Improve `pivot()` and `melt()` to make it as free to reshape data as tidyverse.
- feature: .rolling_slope()
- support different null values for different columns in read_csv
- Polars fails to read CSV file despite 'ignore_errors=True' flag
- Support reading/writing S3 path/URI/URL/file for JSON type
- Support for zstacking dataframes
- Add prepend_constant
- ENH: `pl.DataFrame.describe` to output median/quantiles for all ordered datatypes
- Docs
- Rust not yet supported