Loading 32MB of XML into a DOM structure is bound to use quite a lot of memory, but it seems the XML::XPath->find() is buggy. In either case you'd be better of using something that doesn't build the whole structure, expecially if as you said in the other node you only need very little out of the large XML. XML::Twig or maybe XML::Rules ;-)

It's hard to give you an example without knowing the XML, but using XML::Rules you might start with: 

my $parser = XML::Rules->new(
 rules => [
  'computers,and,other,tags,you do not care about at all' => 'skip',
  '^user' => sub {return $_[1]->{teamid} eq $CONFIG{teamid} },
  'user' => 'as array',
   # only the <user> tags containing the right attribute will be proce
+ssed
  '_default' => 'as is',
  'tags,with,no,attributes' => 'content',
 ]
);

my $data = $parser->parse($the_xml);

[download]
And you end up with a data structure containing only the content of the <user> tags you are interested in. And at no time is the whole document in memory, the module only keeps the data you wanted and the attributes of the yet unclosed nodes in memory.

Jenda
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In reply to Re: XPath crashing by Jenda
in thread XPath crashing by adrianxw

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