> Q. Did the Bamboo router degrade?
> A. Yes. Our older router was built and designed during the early years of Heroku to support the Aspen and later the Bamboo stack. These stacks did not support concurrent backends, and thus the router was designed with a per-app global request queue. This worked as designed originally, but then degraded slowly over the course of the next two years.
From Adam's message on Feb 17th, 2011 (https://groups.google.com/forum/?fromgroups=#!topic/heroku/8...):
> You're correct, the routing mesh does not behave in quite the way described by the docs. We're working on evolving away from the global backlog concept in order to provide better support for different concurrency models, and the docs are no longer accurate. The current behavior is not ideal, but we're on our way to a new model which we'll document fully once it's done.
It looks like random load balancing was already the expected behavior 2 years ago? The "slow degradation" part seems a bit dishonest to me.