Could the gem be modified tofilter out unwanted controllers or controller#actions?  Perhaps pl_analyze could take a
syntax something like this to skip reporting on FeedController:

unix> pl_analyze log/production.log --skip=FeedController

or multiple controllers:

unix> pl_analyze log/production.log --skip=FeedController --skip=UsersController

or controller(s) and action(s)

unix> pl_analyze log/production.log --skip=UsersController#create --skip=UsersController#destroy