(It probably would have been better if you asked about a specific part of performance you want to improve upon).
Here’s a tip, use New Relic to ping your site and check that is still up and running:
- you will be alerted to any issues
- your Heroku app won’t go to sleep which will increase its response time as it won’t have to ‘wake up’ if no one has viewed your site for a while.
Plus use New Relic anyway as it has a wide range of features that are really useful for monitoring database requests, response times, etc.
solved How to speed up my Rails 4 app on Heroku (tips for a n00b)?