Under the category of permission evaluation, three optimizations were made:

• The identifyPolicyEntries list previously had policy provider code for synchronization. This code has been removed and is not available in Java 9, 10, or 11.
• PermissionCollection entries are now stored in ConcurrentHashMap. They were previously stored as HashMap in a Permission class.
• Permissions are now stored in concurrent collections in subclasses of PermissionCollection.