[jdom-interest] performance on tonights CVS

[Alex Rosen]

One thing that's been added since beta 7 is the "buffer" code in SAXHandler,
that tries to preserve the internal subset of the DTD. Try commenting out
all that code in SAXHandler and see if the speed improves. (I wonder if
we'll need to add a method to turn off this feature for performance
reasons...)

Alex

> -----Original Message-----
> From: jdom-interest-admin at jdom.org
> [mailto:jdom-interest-admin at jdom.org]On Behalf Of David D. Lucas
> Sent: Sunday, February 24, 2002 4:43 AM
> To: jdom-interest at jdom.org
> Subject: [jdom-interest] performance on tonights CVS
>
>
> I pulled down the CVS source tonight and wanted to know how
> the current
> JDOM is handling the parsing as compared to JDOM beta 7.  I used
> different SAX parsers and the samples.TestXMLOutput (slightly
> modified)
> to run a few repeating tests.
>
> What I have found seems to indicate that outputting a JDOM
> tree to XML
> for a large file (1.85MB) is about 3 times faster now than
> JDOM beta 7.
> Great job!!!
>
> However, something in the way SAX is being used has impacted
> my Builder.
> build performance which has slipped some 40% in the wrong direction.
> I have not profiled it yet, but was wanting to know if anyone has a
> quick explaination or suggestion on how to get it back up to beta 7
> build speeds.
>
> As a side note, it looks like memory usage is a bit better in the
> current CVS snapshot than beta 7.
>
> Any help would be appreciated.  I know that 1.85MB XML is a
> bit large,
> but that is what my client wants.   We are processing some large
> MQSeries messages and are using JDOM to manipulate the information.
>
> Thanks in advance,
> Dave
>
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