diff --git a/pandas/core/algorithms.py b/pandas/core/algorithms.py index 58384405a5cab..51eeabc14c4c9 100644 --- a/pandas/core/algorithms.py +++ b/pandas/core/algorithms.py @@ -321,7 +321,8 @@ def unique(values): Hash table-based unique. Uniques are returned in order of appearance. This does NOT sort. - Significantly faster than numpy.unique. Includes NA values. + Significantly faster than numpy.unique for long enough sequences. + Includes NA values. Parameters ----------