Beefy Boxes and Bandwidth Generously Provided by pair Networks
more useful options

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??

All XML parsers work in one of two ways. They are either tree based or stream based. A tree-based parser will always read in all of your document and will therefore have a large memory footprint for a decent sized XML document[1]. Stream-based parsers look a the document one token at a time and therefore have far smaller memory requirements.

XML::Parser can be used in both modes. From what you're saying, it seems that XML::XPath uses XML::Parser in tree mode. I'm having difficulty thinking how you could build an XPath processor using a stream-based parser. It's probably possible - but I think it would be very hard work. I don't know of any that currently exist.

If you don't like XML::XPath's memory footprint, have you thought about switching to an alternative (i.e. stream-based) approach?

[1] Let me pre-empt mirod's reply and point out that XML::Twig gives you the ability to build smaller trees from part of your XML document.


"The first rule of Perl club is you do not talk about Perl club."
-- Chip Salzenberg

In reply to Re: XML::XPath memory usage by davorg
in thread XML::XPath memory usage by Jaap

Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":

  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.
  • Log In?

    What's my password?
    Create A New User
    and the web crawler heard nothing...

    How do I use this? | Other CB clients
    Other Users?
    Others surveying the Monastery: (6)
    As of 2020-07-10 09:52 GMT
    Find Nodes?
      Voting Booth?

      No recent polls found