Apple

Cap PyTorch build parallelism for all GCC docker images (#20123) #22109

Job	Run time
set-version	9s
build-benchmark-app / macos-job	54m 28s
build-demo-ios / macos-job	20m 37s
build-frameworks-ios / macos-job	37m 43s
upload-demo-ios	44s
test-demo-ios / mobile-job (ios)	15m 3s
upload-frameworks-ios	1m 1s
	2h 9m 45s

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