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Top Forums Shell Programming and Scripting How to improve the performance of parsers in Perl? Post 302515969 by fpmurphy on Thursday 21st of April 2011 09:04:32 AM
Old 04-21-2011
Unless you need the complete document DOM in memory, a SAX (Sequential Access XML) parser will nearly always be faster. Whereas the DOM operates on the document as a whole, SAX parsers operate on each piece of the XML document sequentially. Even better would be StAX (Streaming API for XML) which is a newer API for pull-parsing of XML

Perl has several SAX modules but I do not see any StAX modules.
 

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Template::XML(3pm)					User Contributed Perl Documentation					Template::XML(3pm)

NAME
Template::XML - XML plugins for the Template Toolkit SYNOPSIS
[% USE XML; dom = XML.dom('foo.xml'); xpath = XML.xpath('bar.xml'); simple = XML.simple('baz.xml'); rss = XML.simple('news.rdf'); %] DESCRIPTION
The Template-XML distribution provides a number of Template Toolkit plugin modules for working with XML. The Template::Plugin::XML module is a front-end to the various other XML plugin modules. Through this you can access XML files and direc- tories of XML files via the Template::Plugin::XML::File and Template::Plugin::XML::Directory modules (which subclass from the Tem- plate::Plugin::File and Template::Plugin::Directory modules respectively). You can then create a Document Object Model (DOM) from an XML file (Template::Plugin::XML::DOM), examine it using XPath queries (Template::Plugin::XML::XPath), turn it into a Perl data structure (Tem- plate::Plugin::XML::Simple) or parse it as an RSS (RDF Site Summary) file. The basic XML plugins were distributed as part of the Template Toolkit until version 2.15 released in May 2006. At this time they were extracted into this separate Template-XML distribution and an alpha version of this Template::Plugin::XML front-end module was added. AUTHORS
Andy Wardley wrote the Template Toolkit plugin modules, with assistance from Simon Matthews in the case of the XML::DOM plugin. Matt Sergeant wrote the XML::XPath module. Enno Derksen and Clark Cooper wrote the XML::DOM module. Jonathan Eisenzopf wrote the XML::RSS mod- ule. Grant McLean wrote the XML::Simple module. Clark Cooper and Larry Wall wrote the XML::Parser module. James Clark wrote the expat library. COPYRIGHT
Copyright (C) 1996-2006 Andy Wardley. All Rights Reserved. This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself. SEE ALSO
Template, Template::Plugins, Template::Plugin::XML, Template::Plugin::XML::DOM, Template::Plugin::XML::RSS, Template::Plugin::XML::Simple, Template::Plugin::XML::XPath perl v5.8.8 2008-03-01 Template::XML(3pm)
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