In order to run, Testacular needs Node.js and a configuration file containing information regarding the files to be tested, those to be ignored, base path, web server port, logging level, etc. (A configuration file sample.)
Regarding its performance, Vojta Jína, a Google engineer, has demoed running about 1,500 AngularJS tests in WebStorm against Chrome Canary and Chrome in less than 5 seconds.
So after running a set of tests based on this....
Microsoft immediately responded by releasing Ovarial