I'll try it out later today. Would be interesting to see actually because, completely anecdotally, GitLab seems faster than sr.ht in my daily usage.
SourceHut is still the winner of most, but GitHub is a lot faster than in the report on forgeperf.org.
I think the perceived speediness of GitHub for me can be mostly attributed to the fact they don't trigger a full page reload for every navigation. Whereas SourceHut is rendered completely server-side AFAIK.
(I meant GitHub in my previous comment, fyi.)