When you use cdn, it should be cached. omniture_code.js slows down the site horribly
I've reported so many problems with Riot websites without achieving anything that I give this a little chance. Anyway, every time I load a page here, on boards, my browser is waiting for cdn.leagueoflegends.com. How pathetic. What's the purpose of content delivery network if it's not cached and receives cookies. And you have quite a bunch of cookies in browser - 2.1 kilobytes. Every request, even for images and other static data sends 2.1 kilobytes of useless data. All necessary?
Anyway, the file that's really slowing it is http://cdn.leagueoflegends.com/omniture/0.0.2/js/omniture_code.js I have no idea why, but it takes 21 seconds to load.
You know this is not a sandbox. You should focus on performance, not play around and making ineffective experiments. And I'm not talking just about board here but even the whole site in general.

Normal site only loads the HTML once the cache has been primed.