We are in the midst of finding ways to dramatically improve our build times. Choosing agents that have previously built the same build/branch plan is key to the effort. There has been questions on whether or not the concept of affinity is built into Bamboo server, but the evidence isn't strong one way or the other. In other words, sometimes it appears to prefer building the same branch plan on the same agent, but other times it appears random even when the previously "preferred" agent is available. Are there other elements in play that we are not considering?