Comment 9 for bug 588684

Just some local testing of the linked branch. Note: locally there are only 2 builder groups - 1 386 virt and 1 386 non-virt, leading to 4 queries replaced by 1. So the time difference is only a 40% improvement.
Local testing:

Clean devel:
At least 41 queries issued in 0.20 seconds OOPS-1616X12
requested oops: http://pastebin.ubuntu.com/444684/ (the last 4 queries)

Above branch:
At least 38 queries issued in 0.14 seconds OOPS-1616X3
requested oops: http://pastebin.ubuntu.com/444681/ (just 1 query at the end).

On edge/production we should see much greater improvements - ~11 builder groups, leading to 22 slow queries replaced by 1. Thanks stub!