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PERF: cythonize groupby-rank #15779
This dispatches to each group individually. Better to have a combined group_rank to do this. It is a bit of code and ideally would share some with the actual rank algos.
referenced this issue
Jan 22, 2018
I can take a look at this. Any tips on what methods to explore? I was thinking of adding a method to the GroupBy class similar to the others for rank and was looking at the rank method in algos.
It wasn't immediately clear to me the best way to knit that all together so figured I'd get your thoughts if you have any