...detect speedups too (#1621)
Summary:
:')
Pull Request resolved: https://github.com/pytorch/benchmark/pull/1621
Reviewed By: albanD, xuzhao9
Differential Revision: D45655876
Pulled By: janeyx99
fbshipit-source-id: e81cc6287b47661b0b31a9f5dbf0e62aa471afa4
