There is low (especially stress test) performance of AS 7.1.0.CR1b. Comparing to 7.1.0.Beta1 there is at least three times worse performance. You can see marked builds at https://hudson.qa.jboss.com/hudson/view/Weld/view/Weld-Performance-All/job/perf-weld-numberguess-stress-single-jboss7/. In artifacts there is the log.txt file, where you can check stress tests results. I have run it quite many times with same or mostly similar results.