AFAICT that is a 5 year old branch.  Is there a version of this based off of master that you can show asv results for?

> Also, if performance is in the end the decisive criterion, I repeat my earlier remark in this thread: we need to be clearer about what we want / expect.

In principle, this is pretty much exactly what the asvs are supposed to represent.

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You have demonstrated that you are willing to repeat yourself more than I am, to the point that I find pandas interactions more frustrating than fulfilling.  I'm going to step away for a little while.