pytorch

c6d30122 - Fix torch.cat() performance regression on single core CPU (#33534)

Fix torch.cat() performance regression on single core CPU (#33534) Summary: This PR addresses the performance regression on `torch.cat()` on CPU with single thread. Previous optimization https://github.com/pytorch/pytorch/issues/30806 introduced regression for several cases on pytorch operator benchmark. See https://github.com/pytorch/pytorch/issues/33334 for detail. Pull Request resolved: https://github.com/pytorch/pytorch/pull/33534 Differential Revision: D20129963 Pulled By: VitalyFedyunin fbshipit-source-id: 3fa6cd266978e5b54fa37105555502b77352df3e