Added running via throughput benchmark options. (#23077)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/23077
Although the difference between running from python and this is not much if we
have forward method's loop long enough (like 1000 in this case).
Reviewed By: mingzhe09088
Differential Revision: D16122343
fbshipit-source-id: 5c1d1b98ae82c996baf9d42bcd04995e2ba60c78
