Depending on a number of parameters it will take a few minutes to much longer. These were all done in a few minutes.
So, would it be possible at some point to have the bot crawl through all of the shots in a scene (or film, or selections of scenes you deem it fit to regrade) and make the correction it’s trained to make. Then, produce LUTs based on the changes made (assuming LUTs could vary slightly between shots in the same scene), and apply that to the shot as a whole? Just trying to think of how a whole film would be graded with a few minutes per frame. Cloud computing/supercomputers of course would get through it quickly.