[jbeja]

Not to mention, FD UI is more performant than anything else.

[danellis]

Can you point me to some data on that?

[sehr]

Here's a pretty cool article from High Scalability on it: http://highscalability.com/blog/2014/9/29/instagram-improved....

[danellis]

Looks like they did a lot of other things at the same time (like not creating app-wide singletons up-front). It would have been nice to see numbers just for rendering.