gitlab.com is slow

Summary

gitlab.com is slow.
(currently, the hlep page shows GitLab Enterprise Edition 8.14.4-ee 8c04d01)

Steps to reproduce

Use the gitlab.com web interface.

Expected behavior

Pages should load reasonably fast (within a few seconds at the most)

Actual behavior

Pages often take 10s of seconds or longer to load.
I use gitlab.com everyday at home and at work, on linux and mac.
This problem is consistent and seems to be getting worse over time.

Relevant logs and/or screenshots

In the attached screenshot, you can see that https://gitlab.com/toasterfire/toasterwater/milestones?state=all (a personal, private repository - but this behavior is common to public repositories as well) took 43 seconds to load.
Sadly, this is not an exceptional case.

Possible fixes

It's hard to say what might cause this behavior, but I'd be interested to see what that query string parameter state=all actually implies. Maybe state=all requests more than what is actually needed to load this page.
Maybe gitlab.com could load the html first and then make several xhr requests for the required state.