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- From: David Megginson <david@megginson.com>
- To: XML List <xml-dev@ic.ac.uk>
- Date: Mon, 29 Mar 1999 13:35:22 -0500 (EST)
Gabe Beged-Dov writes:
> > The XML/SGML processing model is generally to walk through a document
> > (as a collection of events or as a tree) and fire off handlers for
> > different types of things. Even a short to medium-length XML document
> > can cause the handlers to be fired off many thousands of times, and if
> > you're trying to handle hundreds of requests per second, that's going
> > to cause problems with or without XML.
>
> Are we talking about throughput or responsiveness? It would be
> useful to bring up some use-cases where XML processing can't be
> employed using the default handler firing model and try to
> understand what the alternatives are.
I'm talking about throughput -- using a persistent interpreter (like
mod_perl) rather than a CGI can solve most of the responsiveness
problems.
The difficulty is just that firing off so much Perl code is (in Perl's
current design) slow. The original posting suggested using a binary
format because parsing XML with Expat is slow, but in fact, Expat and
the actual XML parsing turn out not to be a bottleneck.
All the best,
David
--
David Megginson david@megginson.com
http://www.megginson.com/
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