polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- Numpy datetime scalars are not recognized
- Polars cannot read Parquet files written by Spark
- Feature request: `explode` option/alternative that does not map empty lists to `null`
- Very long reading or hangs time for lazy slice collection in worker process
- Allow `when` / `then` used in `agg` to return scalar rather than list
- Panic when comparing a dataframe with an object column
- `strategy='multiprocessing'` in `map_elements`?
- JSONL Stream Reader for Cloud Storage
- Schema inference fails with multiple csv files.
- Upsampling unexpectedly discards higher frequency data
- Docs
- Rust not yet supported