I built exactly this once, was fun to set and forget and look back on it in a few months. It calculated the diff and you could see obvious spikes when big chang

I built exactly this once, was fun to set and forget and look back on it in a few months. It calculated the diff and you could see obvious spikes when big changes were rolled out. You saw a lot of big spikes on say Apple.com when new products were announced or marketed, whereas Reddit.com was always changing and couldn't detect any meaningful patterns. It also had ffmpeg in the backend that would create a timelapse for you on demand. I built it when we rolled out our some rebranding/homepage changes on GitHub.com and nobody really knew off the top of our heads when exactly the last time we updated it was. Git only tracked code changes, no visual changes. It was originally built on top of http://www.paulhammond.org/webkit2png/ http://www.paulhammond.org/webkit2png/