pattern(performance): update available tools

Author: daniellmb

patterns/performance.md

@@ -1,7 +1,15 @@
 ## Performance Testing AngularJS
 
-This is something I haven't done yet, so I'm looking for community input on what works well. My current thought is to leverage existing tools such as [benchmark.js](http://benchmarkjs.com/).
+### Benchpress
+
+[Benchpress](https://github.com/angular/benchpress) is a new performance testing tool built by the AngularJS team.
+
+### ng-bench
+
+Another option is the [ng-bench](https://github.com/jbdeboer/ng-bench) project built on top of karma and jasmine.
+
+This is something I haven't done in AngularJS yet, and have not personally tried out the tools mentioned above, so I'm looking for community input on what works well.
 
 ### What is working well for you?
 
-*[pull request welcome!](../#contributing-test-patterns)*
+*[pull request welcome!](../#contributing-test-patterns)*