pt: process frames in parallel for env mat stat #5347

Job	Run time
Build source distribution	27s
determine-arm64-runner	1s
Build wheels for cp311-manylinux_x86_64	5m 28s
Build wheels for cp311-manylinux_x86_64	5m 18s
Build wheels for cp311-macosx_x86_64	10m 12s
Build wheels for cp311-macosx_arm64	3m 4s
Build wheels for cp311-win_amd64	6m 41s
Build wheels for cp310-manylinux_aarch64	4m 14s
build_docker (12)	3m 48s
build_docker (_cu11, 11)	3m 55s
build_pypi_index	6s
upload_pypi	0s
deploy_pypi_index	0s
Pass testing build wheels	3s
	43m 17s

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