Docs js "each" for content replacing is cause choppy scroll further down the page
Thought at first it was just the volume of DOM objects causing choppy scroll (or crummy gists), but it actually only improves by removing the `.each` statement that replaces iPhone content. Definitely optimizations we can make there by caching static values/objects, but somehow we have to avoid the `each` call and only act on the "current" active element.
