Re: [xsl] Optimizing Trax

["J.Pietschmann" <j3322ptm@xxxxxxxx>]

Schwartz, Rechell R, ALABS wrote:
> I am using Trax to transform my xml files, and am finding the performance
> very slow especially for large files. Are there any ways of optimizing the
> performance such as by pre-compiling the stylesheets?

Yes, but your time is probably wasted elsewhere.


> transformer = tFactory.newTransformer(new 
StreamSource(getClass().getResourceAsStream(xsl)));
> transformer.transform(new DOMSource(document), new StreamResult(out));
                             ^^^^^^^^^^^^^^^^
Use a profiler to check where your program wastes time:
- DB access or whereever you get your raw data
- DOM construction
- transformation
If it is the latter, check your XSL for inefficient constructs.
If it is DOM construction, use SAX. Also DOM uses a lot of memory,
which may be a problem in itself (more GC).

J.Pietschmann


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