Over the past couple of years Heroku customers have occasionally reported unexplained latency on Heroku. There are many causes of latency—some of them have nothing to do with Heroku—but until this week, we failed to see a common thread among these reports. We now know that our routing and load balancing mechanism on the Bamboo and Cedar stacks created latency issues for our Rails customers, which
![Routing Performance Update](https://cdn-ak-scissors.b.st-hatena.com/image/square/a1b2a24fb8bb6b5daa830ba9854ce4ba0af7b021/height=288;version=1;width=512/https%3A%2F%2Fwww.herokucdn.com%2Fimages%2Fog.png)