It has been posted many times, but since I ran across it again and it made a significant improvement, I’ll repeat it for others.
Add the following to your WLS start up arguements:
-Djava.security.egd=file:/dev/./urandom
If you are interested in details, seeĀ https://bugs.openjdk.java.net/browse/JDK-6202721
© Scott S. Nelson