pytorch

1fa17a20 - Fix the slowdown of _object_to_tensor since 1.9 (#65721) (#65835)

Fix the slowdown of _object_to_tensor since 1.9 (#65721) (#65835) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/65721 #Closes: https://github.com/pytorch/pytorch/issues/65696 The bug is introduced in https://github.com/pytorch/pytorch/pull/55861, and it causes 100X slowdown since 1.9. ghstack-source-id: 139128267 Test Plan: Performance test: ``` import time from torch.distributed.distributed_c10d import _object_to_tensor start = time.time() _object_to_tensor("x" * 50_000_000) print("Time:", time.time() - start) ``` Reviewed By: rohan-varma Differential Revision: D31219794 fbshipit-source-id: 1abec38f9d51361c1eab6ad5efd87b589322e208 Co-authored-by: Yi Wang <wayi@fb.com>