Don't put your hopes up too much. GitLab does not even have half the community that GitHab has but their service is already a multiple times slower. From my experience if something already starts off really badly, then any attempts to retrospectively fix major issues in their core system rarely work out well. The more successful GitLab will be, the more their service will fall apart under its own weight. This is what happens when you aggressively undersell your service. GitLab are not magicians. Cheap remains cheap in the end.