[Eas-dev] jank measurement in workload automation suite

I see there is a jank measurement capability in workload automation:

http://pythonhosted.org/wlauto/_modules/wlauto/instrumentation/fps.html

Has anyone used this? Limitations, prerequisites etc? I'd like to use this to measure janks during scrolls. I'll give it a shot but I've never used WA before so I thought I'd check first if anyone had comments/experiences to share.

thanks, Steve