Alternatives to New Relic on Heroku? Need to debug high response times

Our production app is experiencing consistently high response times. We’d like to instrument the app so that we can dig deeper into the problem, but New Relic does not support Meteor out of the box, and at first glance, the custom setup looks arduous.

Can anyone recommend an alternative to New Relic that has worked for them for a Heroku-hosted app? Or provide tips on instrumenting a Meteor app with a custom New Relic configuration :wink:?