Understanding variability in Heroku dyno performance

Heroku is a great platform if your app conforms to their expectations, but their dyno abstraction is somewhat leaky. It is surprisingly easy to deploy an application that behaves differently than you’d expect despite their documentation’s warnings about shared CPUs. In this post, I share some research on the performance/behavior of their various dyno classes and how I think about selecting dynos for different workloads. If you’re familiar with Heroku’s platform, I suggest skipping ahead to exploring CPU-intensive workloads.

Thu Apr 15, 2021 3080 words