[ http://issues.apache.org/jira/browse/XALANJ-1689?page=all ]
Brian Minchau updated XALANJ-1689:
----------------------------------
Version: Latest Development Code
(was: 2.5Dx)
> redirect uses unbuffered FileOutputStream -> bad performance when accessing
> networked Windows Shares
> ----------------------------------------------------------------------------------------------------
>
> Key: XALANJ-1689
> URL: http://issues.apache.org/jira/browse/XALANJ-1689
> Project: XalanJ2
> Type: Bug
> Components: Xalan-extensions
> Versions: Latest Development Code
> Environment: Operating System: Windows XP
> Platform: PC
> Reporter: Christian Roth
> Assignee: Xalan Developers Mailing List
>
> The code for the redirect extension creates an unbuffered FileOutputStream.
> This results in very
> bad performance when accessing networked Windows shares.
> For a test, I patched the source in org.apache.xalan.lib.Redirect.java in
> line 449 to read:
> transformer.createSerializationHandler(new StreamResult( new
> java.io.BufferedOutputStream(
> ostream )), format);
> i.e. I wrapped the FileOutputStream with a BufferedOutputStream.
> An example I conducted resulted in the following performance figures:
> Xalan 2.5.1 (no patch): 33s
> Xalan 2.5.1 (w/ my patch applied): 2s
> In these cases, the destination for redirect was a networked Windows share,
> not a local drive. The
> wrapping seems to dramatically decrease communication overhead with the
> networked destination
> machine.
> I suggest wrapping FileOutputStream()s created by redirect and possible other
> locations in Xalan's
> code by a BufferedXXX() implementation to improve performance over networks.
> [Disclaimer: The patch above was only done here locally to investigate the
> issue, it is not intended
> to be the final patch applied as I am not fluent with Xalan internal code
> structure and flow path.]
> -- Christian
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