cpu jitter objects

I am going insane with the frame rate slug when processing a pretty hi-res (apple proRes 422) movie, going through the usual UYVY shader (@dimscale 1, @automatic 0) to captured texture to matrix (@adapt 1) into jitterland. I am just trying to experiment with all the jitter objects that dont come in shader versions (jit.bsort, jit.scanline, jit.tiffany etc).

Is this still the doomed fate for the battle of cpu vs gpu? Is there a massively cheaper way of getting higher res matrix data into and outof GLland? Or are those non-shader version types doomed to only take 320x240 scratchy vids like in the help files?

many thanks in advance, r