I'm pretty sure .world being slow is a web frontend problem. It often takes forever to load in my browser, but the same content loads quickly in the Voyager Android app.
I should probably try the several alternative web UIs they have available to see if they're faster than the default one, but I can't be bothered to walk over to my desktop PC right now.
It can't be the backend because it's got to query the same data whether it's feeding the web UI or Voyager, so that wouldn't explain the vast loading time differences between them. If the backend were slow they would both be slow, but Voyager's load times are great.