Hmm ... could be some of the other tooling around it. Right now I can't get XLSX to talk reliably to DataFrame. I rigged up some tests for 10, 100, 1000, ...

Hmm ... could be some of the other tooling around it. Right now I can't get XLSX to talk reliably to DataFrame. I rigged up some tests for 10, 100, 1000, ... points and performance above about 500 points fell off a cliff. I should look into this more. Thanks for letting me know it can handle things that size.