Detect both speedup and regressions in v3 workflow (#1667)
Summary: Pull Request resolved: https://github.com/pytorch/benchmark/pull/1667
Reviewed By: janeyx99
Differential Revision: D46030617
Pulled By: xuzhao9
fbshipit-source-id: a94ecb2b9c621feb6535d6ba600e57f28826e51e
