Re: Relieving some ClassLoader contention in PreferredClassProvider

Hi Peter,

Peter Jones wrote:

> And I think that the challenge with using ConcurrentHashMap here is in
> correctly dealing with all of the weak references, in both the keys
> and the values (see above problem).  For comparison, I might suggest
> looking at the static "localDescs" table of java.io.ObjectStreamClass:
> prior to JDK 6, it was a regular synchronized HashMap that used a
> custom internal "EntryFuture" class to accomplish (A); for JDK 6, it
> was changed to a ConcurrentHashMap for this RFE (which was encouraged
> by Doug Lea):
>
>         http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=5056445

Very interesting! I can't find any details in the release notes of Java
SE 6 that indicates what kind of performance gains can be achieved. I
realize there is no official benchmark, but just an indication of the
range of performance gains with Jini ERI would be very nice.

> [3] Would anyone like to sell me their JDC/SDN votes for this bug?
>         http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4429536
> (I'm only barely joking.)

Contrary to Gregg's you won't get mine Peter, because every bug I vote
for tends to stall forever so for 5 years I've nothing to sell anymore
to anyone.
--
Mark

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