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A comment on Heroku's Ugly Secret: The story of how the cloud-king turned its back on Rails.

Re:Heroku's Ugly Secret: The story of how the cloud-king tur... by michaelrkn on Wednesday February 13, 2013 @06:06PM (#5216329)
We ran into this exact same problem at Impact Dialing. When we hit scale, we optimized the crap out of our app; our New Relic stats looked insanely fast, but Twilio logs told us that we were taking over 15 seconds to respond to many of their callbacks. After spending a few weeks working with Heroku support (and paying for a dedicated support engineer), we moved to raw AWS and our performance problems disappeared. I want to love Heroku, but it doesn't scale for Rails apps.
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Re:Heroku's Ugly Secret: The story of how the cloud-king tur... by WillieBKevin on Wednesday February 13, 2013 @09:57PM (#5217396)
We moved our Twilio app off Heroku for the same reasons. Extensive optimizations and we would still get timeouts on Twilio callbacks.

The routing dynamics should be explained better in Heroku's documentation. From an engineering perspective, they're a very important piece of information to understand.

We're with https://bluebox.net now and are very happy.

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