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From Ohad Shacham <>
Subject ConcurrentHashMap
Date Sun, 08 Nov 2009 14:47:25 GMT

I noticed that in version 6.0.20 several Hashtables and HashMaps were
replaced by ConcurrentHashMaps. I have noticed that many Hashtables were not
replaced; therefore, I assume that a contention detection tool was used to
identify the contended Hashtables. I would be happy to know if this is the
case and also whether a scalability and/or performance improvement was
achieved by switching these collections with concurrent ones.



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