pytorch

ffede499 - [PyTorch][Static Runtime] Fast path for contiguous to_copy (#65499)

[PyTorch][Static Runtime] Fast path for contiguous to_copy (#65499) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/65499 When the tensors in question are contiguous, there is no need to go through dispatch, use TensorIterator, etc. ghstack-source-id: 139549027 Test Plan: Ran ptvsc2_predictor_bench for ctr_mobile_feed local net following https://fb.quip.com/q8hBAFGMeaOU (but without the profile and compare_results options). Before: I0922 14:00:32.261942 3132627 PyTorchPredictorBenchLib.cpp:312] PyTorch run finished. Milliseconds per iter: 7.18124. Iters per second: 139.252 I0922 14:01:44.865965 3132627 PyTorchPredictorBenchLib.cpp:312] PyTorch run finished. Milliseconds per iter: 7.25314. Iters per second: 137.871 I0922 14:02:56.929602 3132627 PyTorchPredictorBenchLib.cpp:312] PyTorch run finished. Milliseconds per iter: 7.1986. Iters per second: 138.916 I0922 14:04:05.923025 3132627 PyTorchPredictorBenchLib.cpp:312] PyTorch run finished. Milliseconds per iter: 6.89211. Iters per second: 145.093 I0922 14:05:17.953056 3132627 PyTorchPredictorBenchLib.cpp:312] PyTorch run finished. Milliseconds per iter: 7.19577. Iters per second: 138.971 mean: 7.144172, stddev: 0.1283 After: I0922 13:51:55.233937 3086245 PyTorchPredictorBenchLib.cpp:312] PyTorch run finished. Milliseconds per iter: 6.79709. Iters per second: 147.122 I0922 13:53:03.062682 3086245 PyTorchPredictorBenchLib.cpp:312] PyTorch run finished. Milliseconds per iter: 6.77605. Iters per second: 147.579 I0922 13:54:10.230386 3086245 PyTorchPredictorBenchLib.cpp:312] PyTorch run finished. Milliseconds per iter: 6.70993. Iters per second: 149.033 I0922 13:55:18.403434 3086245 PyTorchPredictorBenchLib.cpp:312] PyTorch run finished. Milliseconds per iter: 6.81044. Iters per second: 146.833 I0922 13:56:26.568646 3086245 PyTorchPredictorBenchLib.cpp:312] PyTorch run finished. Milliseconds per iter: 6.80965. Iters per second: 146.85 mean: 6.800632, stddev: 0.013227 Looks like about a 5.3% improvement. Reviewed By: hlu1 Differential Revision: D31125492 fbshipit-source-id: 92ab5af242d0a84dcf865323a57b48e8374eb823