User blog comment:LoopKat/Embedded videos cause massive lag/@comment-5266525-20140531070921/@comment-24613667-20140601021834

That's an interesting point, but all of the icons in the Champion Roster section are loaded for me and the page still lags (unless there are more hidden icons somewhere that I don't know of). The roster section has also always been there, so I don't see why it would randomly be the cause (this also might be true of embedded videos but, as I pointed out, they're the only variable that I can think of). Plus, as I said in the blog post, this occurs on ALL wikis for me (ones that don't have a hundred hidden icons).

It's also interesting that you'd point to Yasuo's page because it's also a particularly laggy one for me, to the point that I can barely use it.