We use elastic bamboo, with windows images.
When bamboo starts instances, the instances' up time is roughly 10 minutes before the agent is available.
Actually this is a recurrent complaint, Atlassian is working to speed up the process from their side but on Amazon's end is still takes about 8 minutes to start up the instance. There's a improvement request open regarding this here: https://jira.atlassian.com/browse/BAM-13111
I recommend you to vote for it and a add a comment explaining how this is affecting you, most people don't realize but the more activity you have on a improvement request the more likely it is to be implemented.
Hope this information helps!
Did you compare it against a plain Windows 2008 R2 on the same instance type?
It looks like you're new here. Sign in or register to get started.