We've been doing a huge amount of work on performance and availability over the last number of releases [1] and are continuing to make big advancements in our infrastructure [2] to host millions of projects on GitLab.com. Expect this to be a lot better now and in the future, especially as this marks a big step in GitLab.com's maturity.
[1] https://gitlab.com/groups/gitlab-org/issues?label_name%5B%5D... [2] https://gitlab.com/gitlab-com/infrastructure/issues?scope=al...