Serge posted an article today that discusses this issue in some detail. See "Explicit Nulling" in http://www-106.ibm.com/developerworks/java/library/j-jtp01274.html.
Great article! Thank you, Noel.
Java performance has few absolutes. For example, the author of that article is not a fan of user-level object pooling. Neither, for that matter, is the J2SE tech lead. However, when we added object pooling of certain objects in James, we found that performance improved significantly under load.
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