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Posted to xbean-dev@geronimo.apache.org by "Mark Struberg (JIRA)" <ji...@apache.org> on 2014/10/07 08:48:35 UTC

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

     [ https://issues.apache.org/jira/browse/XBEAN-274?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Mark Struberg closed XBEAN-274.
-------------------------------
    Resolution: Fixed

btw, found this with my OSS donated YourKit profiler. So thanks to yourkit!

> 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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