Re: [xml] memory usage question

[JC Oosthuizen <jc oosthuizen gmail com>]

On 8/17/05, Kasimier Buchcik <kbuchcik 4commerce de> wrote:
> Hi,
>
> On Wed, 2005-08-17 at 10:08 -0400, Daniel Veillard wrote:
> > On Wed, Aug 17, 2005 at 10:04:08AM -0400, Rob Richards wrote:
> > > Daniel Veillard wrote:
> > >
> > > > Ho ho ... if it's really the same document on both side there is something
> > > > fishy, I can't think of anything leading to this, seems it's twice the size
> > > > on Linux, and I really can't see why. I would be very interested in
> > > > feedback
> > > > on this, it may be a stupid accounting error in xmlmemory.c, or a real bug
> > > > which in that case sounds quite serious.
> > > GD!!! It was using the wrong file there. The other file (damn typo) was
> > > 2X the size which caused this.
> > > real numbers look correct.
> >
> >   Damn, I was hoping for a cheap 2x memory usage optimization on Linux !
> > How disapointing :-)
>
> Oops, so I can burry my started test already :-)
>
> Greetings,
>
> Kasimier

Hi.

Out of interest sake how will the memory usage differ if one was not
using a dictionary? And what is actually added into the dictionary?

If I have a big XML file containing lots of the same tags with small
bits of data within these tags how much benefit will a dictionary
give?

eg.
<root>
  <item id="1">
    <tag1>Some data</tag1>
    <tag2>123</tag2>
  </item>
  ...

  ...
</root>

Say I have 20 000 of these items how much will the dictionary save?



JC Oosthuizen