polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- Should add that pl.expr.sum() replaces None with 0
- Improved DB Type Inference
- err: strptime panics (instead of erroring) for out-of-bounds dates
- perf: Add a VarInt encoding for the row encoding
- Saving parquet to AWS S3 with df.write_parquet() fails with FileNotFound
- perf: fast path to generate group idxs for vanilla int_range in group_by_dynamic
- Issue with lazy frames reading from s3 in long running process
- refactor(python): Split file of lazyframe methods
- Allow loading lists of variable-length numpy arrays into polars dataframe
- Errors in scan_delta and write_delta with nested struct schema evolution (aka adding new field)
- Docs
- Rust not yet supported