JetPack 4.5 Production Release with L4T 32.5

Is the VPI 1.0 docs available somewhere? It says 22nd in the announcement but I can’t find them.

Also here: Release Notes :: NVIDIA JetPack Documentation it says VPI 1.0 has support for Optical Flow on the cpu and gpu. Does that mean it is not supported on the PVA?
On this thread (Any details about Stereo & Optical Flow Engine? - #2 by dusty_nv) there is talk of a hardware optical flow engine. Is that what is being used?

What I’m trying to determine is if there is any performance improvement in running VPI Optical Flow compared to just running OpenCV Optical Flow?