Github user aljoscha commented on the pull request: https://github.com/apache/flink/pull/879#issuecomment-118037363 Ok, the test results I posted earlier seem correct. I also ran the tests on my machine with two TaskManagers, There the result is the same for master/event-time/event-time-marks-every-500. The overhead seems to not be from the additional object creation/joda.time.Instant but from the additional network traffic or from other effects that happen with the network and watermarks.
--- If your project is set up for it, you can reply to this email and have your reply appear on GitHub as well. If your project does not have this feature enabled and wishes so, or if the feature is enabled but not working, please contact infrastructure at infrastruct...@apache.org or file a JIRA ticket with INFRA. ---