pytorch

ffdca33b - Only optimize after change (redo) (#59809)

Only optimize after change (redo) (#59809) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/59809 Some how this didnt get landed previously in ghstack mixup Test Plan: Imported from OSS Reviewed By: pbelevich, zhxchen17 Differential Revision: D30200060 Pulled By: eellison fbshipit-source-id: 47f256421a1fe1a005cd11fcc4d7f023b5990834