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.
