polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- Push down selections into joins
- `cum_fold_exprs` does not broadcast a `lit()` initial `acc` to the correct length
- DataFrame.write_parquet doesn't use RLE_DICTIONARY encoding for nested columns
- List/Array: `sum` operation not supported
- `ComputeError` when reading a CSV with [square brackets] in file path
- pl.concat_list(pl.col("struct_of_structs")) out of memory and crashes
- Option to disable schema inferring while using `json_normalize()`
- Option for `json_normalize()` to flatten a JSON recursively
- Rounding error for `round_sig_figs` on `Float64`
- enh: add `closed` argument to `business_day_count`
- Docs
- Rust not yet supported