Hello,
Today when my application almost done I started to work on performance.
In addition to bindonce directive magic I found this site: Debugging performance problems in AngularJS with Batarang and Chrome DevTools very helpful.
Further, there you can find good Chrome plugin AngularJS Batarang that will help you to detect most performance issues.
Here are some screenshots to make some sense to what I post:
Hope it will help to someone