Nope, the content is loaded dynamically from their API after the rest of the page has loaded: https://i.imgur.com/Kxs9l7j.mp4
Sure, the list of my repositories is server rendered, but I already know my list of repositories. The thing I'm waiting for 99% of the time when loading github.com is to see if there's any new activity.
Sorry about the graphical glitches, blame nvidia or xorg or gnome or something.
Likely because the list of repositories changes infrequently, so it's a better candidate for caching. They serve what then can quickly, quickly, then pull in the naturally slower stuff later.
Like 5-10 years ago, writing.com updated their content from loading static pages to be more dynamic.
What they actually did was continue loading the content statically, then hide it behind a 1 or 2 second loading spinner that wasn't actually loading anything.
Seems like users have just come to expect spinners...
(I don't know how the site currently works, haven't been there in a long time)
Github is annoying. Some pages are SSR some aren't. The js is quite resource hungry so I tend to keep js off for github until I get to a page that needs it.
In fact, I'm pretty sure Github is rendered server side for the first load. You shouldn't be seeing any spinners. I'd check if I wasn't on my phone.