From: Mark Van Holstyn <mvette13@...>
Date: 2006-11-07T08:28:17+09:00
Subject: Re: REXML

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If you want speed, look at libxml-ruby. It is many many times faster than
REXML, and it supports SAX parsing as well.

Mark

On 11/6/06, Chilkat Software <support@chilkatsoft.com> wrote:
>
>
> Is that a mistake?  Out of curiosity I took a look on my wife's computer
> (she's the iPod user) and her XML file was only 231KB.  The structure
> of it conforms to the code you shared, so I know it's the right file...
>
> Did you mean to say MB instead of GB?
>
> -Matt
>
>
> At 05:03 PM 11/6/2006, you wrote:
>
> >pdg wrote:
> > > Hi All,
> > >
> > > As a first exercise with Ruby, I am going through the Pickaxe book and
> > > creating a jukebox. I haven't even tried to create an array of songs
> > > yet, because I got distracted and wanted to work this out. I am trying
> > > toi feed in the data from my iTunes xml file to it to get the data, I
> > > can get it to work if I delete most of the xml file, but when it's 5-6
> > > gig,
> >
> >OMFG. That's a -huge- XML file. Probably all of my MP3s together would
> >fit into there with base64-encoded contents :P
> >
> > > rexml just seems to die. I have vaguely heard that stream parsing
> > > may be the answer, but am totally unaware of how to use it.
> > >
> >
> >Well, time to learn. I probably never even saw a computer that could
> >handle a XML file that size using straightforward DOM parsing - which
> >normally "blows up" the original XML document's size in bytes five times
> >and more. And REXML definitely doesn't have performance of any kind
> >amongst its qualities. (And for completeness' sake, I never 'clicked'
> >with the API either, but I'm a minority there.)
> >
> >You want a Ruby binding to a stream or pull parser - to my best
> >knowledge, REXML is neither. That means libxml2, expat, or Xerces.
> >Compiling Required - I think the one-click installer comes with one of
> >these, buggered if I know which.
> >
> >After that, Google is your friend. Look at the documentation to
> >whichever parser you decided to use and use that - personally, I don't
> >do much / no non-tree XML parsing at all, so I'm mainly guessing around
> >on this. The main difference is that while with REXML, you can
> >arbitrarily look around the XML document, with stream and pull parsing,
> >you can only process the document in order, and have to keep the state
> >of that processing (e.g. which track you're currently "working on") in
> >your Ruby code.
> >
> >David Vallner
> >
> >
>
>
> --
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>
>
>


-- 
Mark Van Holstyn
mvanholstyn@gmail.com
http://lotswholetime.com

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