Hi Peter, For further understanding, may I know more details about the test code?
Thanks, Xuelei > On May 11, 2021, at 10:31 PM, Peter Firmstone <peter.firmst...@zeus.net.au> > wrote: > > Just ran some performance stress tests to compare performance between Java 8 > and Java 14 with SecurityManager enabled and using TLSv1.3 secure > communications. > > On Java 8, AccessController.getStackAccessControlContext[native]() is 7,741ms > of process CPU consumption. > > On Java 11, AccessController.getStackAccessControlContext[native]() is > 7,769ms of process CPU consumption. > > On Java 14, AccessController.getStackAccessControlContext[native]() is > 133,815 ms of process CPU consumption. > > On Java 16, AccessController.getStackAccessControlContext[native]() is 5,144 > ms of process CPU consumption. > > I wasn't expecting such a huge difference in performance. > > Total time for the test on Java 8 is 97 seconds. > > Total time for the test on Java 11 is 1 minute 37 seconds (same as Java 8) > > Total time for the test on Java 14 is 2 minutes and 1 second. > > Total time for the test on Java 16 is 1 minute and 36 seconds. > > Both tests are using TLSv1.3 secure communications. > > It would seem that Java 16, 8 and 11 are the performance winners in this > case, where the above method is less than 0.5% of CPU. Java 14 is around 15% > of CPU. > > Not sure why Java 14 is performing poorly in comparison to other versions, > the results are pretty consistent to the second. > > -- > Regards, > Peter Firmstone > Zeus Project Services Pty Ltd. >
