Emily Zhu

Sort MultiIndex to improve performance

1

Sorting a MultiIndex dataframe improves performance. In some cases, indexing a MultiIndex dataframe without sorting can even throw an `UnsortedIndexError`, so this change prevents that from occuring. (source: https://pandas.pydata.org/pandas-docs/stable/user_guide/advanced.html#sorting-a-multiindex)

Hi, I'm having unexpected behavior that could just be me misusing the library, or could be a problem with the library itself. Either way, I'd greatly appreciate if someone could...