With computer vision you end up wanting to read and write to huge buffers that aren't practical to serialize and are difficult to share. And even allocating and freeing multi-megabyte framebuffers at 60 FPS can put a little strain on the allocator, so you want to reuse them, which means you have to think about memory safety.

That is probably why his demo was Sobel edge detection with Numpy. Sobel can run fast enough at standard resolution on a CPU, but once that huge buffer needs to be read or written outside of your fast language, things will get tricky.

This also comes up in Tauri, since you have to bridge between Rust and JS. I'm not sure if Electron apps have the same problem or not.