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From "Knut Anders Hatlen (JIRA)" <j...@apache.org>
Subject [jira] Created: (DERBY-3004) Get rid of the finalizer in EmbedResultSet
Date Tue, 14 Aug 2007 07:45:32 GMT
Get rid of the finalizer in EmbedResultSet
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                 Key: DERBY-3004
                 URL: https://issues.apache.org/jira/browse/DERBY-3004
             Project: Derby
          Issue Type: Improvement
          Components: JDBC, Performance
    Affects Versions: 10.3.1.4
            Reporter: Knut Anders Hatlen
            Assignee: Knut Anders Hatlen
            Priority: Minor


Finalizers make object allocation and garbage collection more expensive and should be avoided
for object types that are frequently allocated. EmbedResultSet has a finalize() method and
is frequently allocated for many types of load. The following comment was posted on DERBY-1876:

By commenting out the finalize() method in EmbedResultSet, the time to run the test on my
laptop is reduced from ~3 seconds to ~1.3 seconds (OpenSolaris, Sun Java SE 6). Since the
finalizer is a no-op if the activation isn't single-use, I think we should investigate whether
there are ways to avoid this cost for ResultSets that don't need the finalizer.

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