Some parts of Github are SPA island, which is why the DOM load fast, but then it has to wait for the JavaScript files and the request made by those files. Codeberg can be used with JavaScript disabled and you don’t have that much extra requests (almost everything is rendered serverside).

The transferred part is for the gzipped transfer. That makes sense if the bulk of the data is HTML (I have not checked).

I’ve disabled the cache for the network requests.