We are considering to use jBPM for enterprise application. After a few rounds of testing, we have found the performance of jBPM satisfactory, except the TaskMgmtSession.getTaskMgmtSession call. However a strange layered structure of the test results were noticed. For example a process instance creation took around 200-600 ms, but 95% of the points were in the 175-225 and 575-625 range. Anyone else encountered the same, or there is a known reason for it?