One of our most important goals at Heroku is to be boring. Don’t get us wrong, we certainly hope that you’re excited about the Heroku developer experience — as heavy users of Heroku ourselves, we certainly are! But, even more so, we hope that you don’t have to spend all that much time thinking about Heroku. We want you to be able to spend your time thinking about the awesome, mission-critical things you’re building with Heroku, rather than worrying about the security, reliability, or performance of the underlying infrastructure they run on.

Since April 2021, the Heroku Runtime team has been working to deploy upgrades to the infrastructure powering Common Runtime apps, and we’re excited to formally announce the performance improvements that customers are already seeing.

When this Changelog post was published in May introducing the changes, almost all Common Runtime apps had been migrated from what we internally called the “classic“ infrastructure to the new “sharded” architecture. In addition to performance enhancements, this migration is expected to result in lower latency across the platform.

Around 99.9% of customers didn’t have to make any changes to their Heroku apps to benefit from these upgrades, and dyno prices are...