I've opened an issue with some improvements suggestions, like surfacing when we are rate limited and allowing gradual access to the data while the import is going on: https://gitlab.com/gitlab-org/gitlab-ce/issues/66525
The importer can still get better but we're importing about 500 projects per hour at peak https://www.dropbox.com/s/hr3ndcmu21aehmk/Screenshot%202019-...
I'm generally very pleased with GitLab. I'm delighted that it's open source.
Please let me know if this issue addresses the problem you encountered, would love to make sure we're prioritizing it. https://gitlab.com/gitlab-org/gitlab-ce/issues/20780
https://gitlab.com/gitlab-org/gitlab-ce/issues/65194 https://gitlab.com/gitlab-org/gitlab-ce/issues/52956
No idea when these are going to be deployed. 12.2, 12.3, 12.5... But I'll keep checking in and trying the import every few weeks.
See also https://gogs.io/