I have released flyerhzm-bullet 1.4.0 gem.
The flyerhzm-bullet gem is designed to help you increase your
application’s performance by reducing the number of queries it makes.
It will watch your queries while you develop your application and
notify you when you should add eager loading (N+1 queries) or when
you’re using eager loading that isn’t necessary.
It also provides some notification, such as javascript alert, browser
console.log, bullet log, rails log and growl.
I think you will really like it.
The gem is here: GitHub - flyerhzm/bullet: help to kill N+1 queries and unused eager loading