benchmark

085167e5 - Delete deepcopied model after use in benchmark to reduce memory consumption (#111868)

Delete deepcopied model after use in benchmark to reduce memory consumption (#111868) Summary: As title. X-link: https://github.com/pytorch/pytorch/pull/111868 Approved by: https://github.com/msaroufim, https://github.com/thiagocrepaldi ghstack dependencies: #111867, #111593 Reviewed By: izaitsevfb Differential Revision: D50626511 fbshipit-source-id: d8d817fb5e9ce325186b36da06215d168d39e43c