In my opinion, if you're using anything other than 1X dynos on Heroku you are compensating for some other part of your stack being broken. You may want to read

In my opinion, if you're using anything other than 1X dynos on Heroku you are compensating for some other part of your stack being broken. You may want to read this section: https://blog.heroku.com/archives/2014/2/3/heroku-xl#understanding-perc99-and-tail-latencies https://blog.heroku.com/archives/2014/2/3/heroku-xl#understa... Performance dynos give you much higher performance and much better consistency, resulting in dramatically reduced tail latencies over 1X and 2X dynos. Choosing performance dynos for a high-traffic or performance-sensitive app is definitely not "compensating for some other part of your stack being broken"; in fact it's a very smart choice.