Eric,
Thanks for your response. 'Defer node expansion'
is listed as a DOM feature. My application makes use
of SAX parsing. I don't believe this feature will
apply.
Thanks.
-Raj
--- "Eric J. Schwarzenbach"
<[EMAIL PROTECTED]> wrote:
> This is late reply, but fwiw, have you tried turning
> on or off the feature
>
>
>
http://apache.org/xml/features/dom/defer-node-expansion
>
> The intention of the feature is to make parsing
> faster, but with certain
> situations / document sizes it actually slows it
> down considerably. Or
> at least it used to--I haven't played with it for a
> while so my data may
> be old, but it's easy enough to try. Note that the
> default value of this
> seems to depend on what implemention you use, so I
> would make sure to
> try it explicitly set both ways.
>
> Eric
>
> Ritu Raj Tiwari wrote:
>
> >Folks,
> >I am migrating an application that makes use of
> >validating XML parsing. It made use of the crimson
> >parser and we are moving to xerces.
> >
> >The XML documents I encounter have a huge DTD they
> >need to be validated against. On many occasions the
> >documnents are actually much smaller than the DTD!
> >Crimson had no way to cache grammars so the xerces
> >grammar pool looked really exciting for performance
> >gains.
> >
> >However, after enabling grammar caching, and
> running
> >comparison with my codebase on JDK 1.4.2 + Crimson
> vs
> >JDK 5 + Xerces, I see negligible, if any,
> performance
> >gain. I am looking at the total CPU time of the
> Java
> >process as it runs through a suite of about 400 XML
> >files. There is a lot going on apart from XML
> parsing,
> >but Xerces vs Crimson (and the JDK) are the only
> major
> >differences between the codebases.
> >
> >My questions are:
> >- Are thre any obvious ways of boosting Xerces
> >performance? In my application, all the documents
> make
> >use of the same DTD.
> >- I am currently on the xerces version that ships
> with
> >JDK 5. Will moving to xerces 2.6.2 have any gains?
> >
> >Thanks.
> >-Raj
> >
>
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