DOC: Performance improvement in non-unique reindex

morotti · morotti · commit b0b4b4900185 · 2023-11-03T13:16:14.000Z
diff --git a/doc/source/whatsnew/v2.2.0.rst b/doc/source/whatsnew/v2.2.0.rst
@@ -308,7 +308,7 @@ Performance improvements
 - Performance improvement in :meth:`SeriesGroupBy.idxmax`, :meth:`SeriesGroupBy.idxmin`, :meth:`DataFrameGroupBy.idxmax`, :meth:`DataFrameGroupBy.idxmin` (:issue:`54234`)
 - Performance improvement when indexing with more than 4 keys (:issue:`54550`)
 - Performance improvement when localizing time to UTC (:issue:`55241`)
-
+- Performance improvement in non-unique :meth:`DataFrame.reindex` and :meth:`Series.reindex` when target is a :class:`MultiIndex` (:issue:`46235`)
 .. ---------------------------------------------------------------------------
 .. _whatsnew_220.bug_fixes:
 
