DynamicPolicyProvider concurrency

[Gregg Wonderly]

I have been looking into some seemingly slow responses in several clients 
running simultaneously, and I see in some stack traces that there are 
synchronization points in DynamicPolicyProvider.implies() that seem to be 
heavily contended.  We probably need to revisit this class and rewrite it to use 
copy on write mutation so that reads (the majority of activity) are completely 
uncontended.

Any thoughts or experience with this issue?
Gregg Wonderly