Author here--happy to answer questions :) Siuba has come a long way since I wrote this, and now can optimize for fast grouped operations!: * https://github.co

Author here--happy to answer questions :) Siuba has come a long way since I wrote this, and now can optimize for fast grouped operations!: * https://github.com/machow/siuba https://github.com/machow/siuba * https://siuba.readthedocs.io/en/latest/developer/pandas-group-ops.html https://siuba.readthedocs.io/en/latest/developer/pandas-grou...