Maybe it was an accident(it happened ten times!) but the first packets were answered faster by the old one but the last ones were answered faster by the new one! here is a picture of my tests:The first one is multithreaded and the second one is single threaded: History uploaded the source: 11/3/2012updated the source: 1/7/2013 - added stress test to test DNS under stressful conditionsadded binary