I don't have details in front of me, but I understand that many of the popular Concurrent classes have been back-ported to Java 1.4. If you like, I can get more details if you can't find it on the Internet.

The back-port classes don't use the new Java byte-codes that were added in Java 5 so there still is some performance improvement in Java 5. But if the alternative is to require Java 5, some users might want to take a bit lower performance instead.

Craig

On Aug 6, 2007, at 8:19 AM, Andrus Adamchik wrote:


On Aug 5, 2007, at 5:39 AM, Kevin Menard wrote:

the new concurrent API could yield significant speed improvements.

Being all backwards compatible, I haven't played much with that, but I suspect that things like ConcurrentHashMap should help us to improve throughput of DataRowStore and EventManager. So I am softening my stand against 3.0 switch to Java 5 :-)

Maybe a poll on the user list is a good idea?

Andrus




Craig Russell
Architect, Sun Java Enterprise System http://java.sun.com/products/jdo
408 276-5638 mailto:[EMAIL PROTECTED]
P.S. A good JDO? O, Gasp!

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