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Posted to xbean-dev@geronimo.apache.org by "Mark Struberg (JIRA)" <ji...@apache.org> on 2014/10/07 08:44:33 UTC

[jira] [Created] (XBEAN-274) Xbean finder is slow because of String.replaceFirst

Mark Struberg created XBEAN-274:
-----------------------------------

             Summary: Xbean finder is slow because of String.replaceFirst
                 Key: XBEAN-274
                 URL: https://issues.apache.org/jira/browse/XBEAN-274
             Project: XBean
          Issue Type: Bug
          Components: finder
    Affects Versions: 4.0
            Reporter: Mark Struberg
            Assignee: Mark Struberg
             Fix For: 4.1


JarArchive uses entry.getName().replaceFirst(".class$", "");

This is effectively a replacement of the last ".class" in the entry name.
This is pretty slow as replaceFirst internally creates a PatternMatcher.
By replacing this line with an endsWith + substring I ended up with 20% performance boost. 
Overall in a real world application my OpenWebBeans boot time went down from 1020ms to 969ms.



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