Added feature to whats-new.rst

JoelJaeschke · JoelJaeschke · commit 939b9b8aacf6 · 2023-02-04T13:08:27.000+01:00
diff --git a/doc/whats-new.rst b/doc/whats-new.rst
@@ -47,6 +47,12 @@ Deprecations
 ~~~~~~~~~~~~
 
 
+Enhancements
+~~~~~~~~~~~
+
+- Use fastpath when grouping both montonically increasing and decreasing variable
+  in :py:class:`GroupBy` (:issue:`6220`, :pull:`7427`). By `Joel Jaeschke <https://github.com/joeljaeschke>`_.
+
 Bug fixes
 ~~~~~~~~~
 
