What's new in 1.5.3 (December ??, 2022)

These are the changes in pandas 1.5.3. See :ref:`release` for a full changelog including other versions of pandas.

Fixed regressions

Fixed performance regression in :meth:`Series.isin` when values is empty (:issue:`49839`)
Fixed regression in :meth:`DataFrameGroupBy.transform` when used with as_index=False (:issue:`49834`)

.. contributors:: v1.5.2..v1.5.3|HEAD