DOC Add ASV benchmark link to README
.. -*- mode: rst -*-
-|Azure|_ |Travis|_ |Codecov|_ |CircleCI|_ |Nightly wheels|_ |Black|_ |PythonVersion|_ |PyPi|_ |DOI|_
+|Azure|_ |Travis|_ |Codecov|_ |CircleCI|_ |Nightly wheels|_ |Black|_ |PythonVersion|_ |PyPi|_ |DOI|_ |Benchmark|_
.. |Azure| image:: https://dev.azure.com/scikit-learn/scikit-learn/_apis/build/status/scikit-learn.scikit-learn?branchName=main
.. _Azure: https://dev.azure.com/scikit-learn/scikit-learn/_build/latest?definitionId=1&branchName=main
.. |DOI| image:: https://zenodo.org/badge/21369/scikit-learn/scikit-learn.svg
.. _DOI: https://zenodo.org/badge/latestdoi/21369/scikit-learn/scikit-learn
+.. |Benchmark| image:: https://img.shields.io/badge/Benchmarked%20by-asv-blue
+.. _`Benchmark`: https://scikit-learn.org/scikit-learn-benchmarks/
.. |PythonMinVersion| replace:: 3.7
.. |NumPyMinVersion| replace:: 1.14.6
