pytorch

5b839bca - [ONNX] Optimize export_onnx api to reduce string and model proto exchange (#44332)

[ONNX] Optimize export_onnx api to reduce string and model proto exchange (#44332) Summary: Optimize export_onnx api to reduce string and model proto exchange in export.cpp Pull Request resolved: https://github.com/pytorch/pytorch/pull/44332 Reviewed By: bwasti, eellison Differential Revision: D23880129 Pulled By: bzinodev fbshipit-source-id: 1d216d8f710f356cbba2334fb21ea15a89dd16fa