polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- allocator=default doesn't work because it is tied to macos and emscripten
- Relative tolerance in `join_asof`
- [PROPOSAL] Add `format="mixed"` or enhanced format inference to `Expr.str.to_datetime`
- Improve DataFrame construction from dictionary mapping `dict[column_name, dict[row_label, value]]` (Polars poor handling of nested json)
- fix(rust): Fix `Int128` literal casting in `when/then/otherwise` expressions
- Large memory usage due to (duplicated?) list data in a join
- Memory leakage in `read_parquet` when not using pyarrow since polars 1.28
- `jemalloc` future/replacement?
- `list.eval(pl.element().fill_null())` doesn't work on empty DataFrames
- `pl.lit(series)` does not create a scalar value
- Docs
- Rust not yet supported