pytorch

35084ee4 - [PyTorch] Improve OperatorEntry::getKernelForDispatchKey (#64838)

[PyTorch] Improve OperatorEntry::getKernelForDispatchKey (#64838) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/64838 The returned pointer, if present, could never be nullptr, so there is no reason to wrap it in an optional rather than just using the nullptr state. The repeated calls to kernels_.at() were not getting optimized away, so just use the perfectly good iterator find() already gave us. ghstack-source-id: 138304429 Test Plan: CI Reviewed By: bdhirsh Differential Revision: D30875748 fbshipit-source-id: 9cbb875715b7a582380c7402155fdbe21944dc85