.. _changes_0_20_1:

Version 0.20.1

**October XX, 2018**

This is a bug-fix release with some minor documentation improvements and

enhancements to features released in 0.20.0.

- |Efficiency| make :class:`cluster.MeanShift` no longer try to do nested

parallelism as the overhead would hurt performance significantly when

``n_jobs > 1``.

:issue:`12159` by :user:`Olivier Grisel <ogrisel>`.

- |Fix| :func:`linear_model.SGDClassifier` and variants

with ``early_stopping=True`` would not use a consistent validation

split in the multiclass case and this would cause a crash when using

those estimators as part of parallel parameter search or cross-validation.

:issue:`12122` by :user:`Olivier Grisel <ogrisel>`.