The messaging integration certainly looks really good, we're trying out Let's Chat, but development is kinda slow (and we don't have the time to contribute). How does GitLab CI compare to Jenkins? Will I be able to substitute it for simple and complex projects?

Is there a slender version of GitLab for small computers like the RaspberryPi? All of the dependencies kinda hog/slow it down, and I don't really need realtime performance. I've grown fond of the interface (at work), and would like to use it for my hobby projects.