Comment by Foxandxss

It is indeed faster but I am sorry to say that this is a good example of "How to not develop an angular app".

DOM manipulation in a controller is something you can't do and who says controllers, says services too.

On the other hand, the double ng-repeat could be a hot spot for the bad performance.

Don't get me wrong, the app is awesome, awesome idea but the implementation doesn't respect the angular way so it is really slow.