I would prefer to do this rust side. I started yesterday and got some speedup with https://docs.rs/rayon/latest/rayon/

It has been requested by others: pyranges/ruranges_py#33

This is a tracking issue really. The work will mostly happen in ruranges-core and ruranges-py.

@marco-mariotti This seems to give decent speedup. I do not know if the libraries (polars-bio especially) we compete with use multiple cores under the hood?