Re: [xml] libxml2 review in windows::developer

[Daniel Veillard <veillard redhat com>]

On Fri, Apr 11, 2003 at 12:49:27PM +0200, Peter Jacobi wrote:
> Hi Daniel,
> 
> I wanted only to report this as a good news/bad news factoid:

  Yeah, I wasn't negative about the posting more about the fact that
they apparently didn't tried to use libxml directly, i.e. they didn't
bothered looking at the native APIs

> good news: libmxml is considered mainstream, even on Win32
> bad news: rather weak comparative benchmark doesn't give real information.

  yep,

> >   Not much to me because I don't know what they benchmarked.
> 
> Reading the file into a tree, walking the tree, thawing objects:
>  
> void read_file(char const *input_name, FILE *output)
> {
>   using xmlpp::DomParser;
>   using xmlpp::Node;
>   using xmlpp::Attribute;
> 
>   DomParser       parser(input_name);
>   Node            *root     = parser.get_root_node();
>   Node::NodeList  children  = root->children("entry");

  you see, for me it's very hard to map that to the associated calls
in libxml2, I can't even tell where the document is actually parsed,
nor what root->children("entry"); actually does, is taht a call to XPath ?
or a direct walk of the children nodes, or ...

>   Node::NodeList::const_iterator  begin = children.begin();
>   Node::NodeList::const_iterator  end   = children.end();
> 
>   for(int i = 0; begin != end; ++begin, ++i)
>   {
>     Node const      *node   = *begin;
>     Attribute const *year   = node->attribute("year");
>     Attribute const *month  = node->attribute("month");
>     Attribute const *day    = node->attribute("day");
>     Attribute const *who    = node->attribute("who");
>     Entry           entry(year->value(),
>                           month->value(),
>                           day->value(),
>                           who->value());

  I can think of ways to significantly speed up attribute value 
lookup in the general case too..
  ATM I'm working on features, maybe I will have time to do some
speedup work before the summer..

-- 
Daniel Veillard      | Red Hat Network https://rhn.redhat.com/
veillard redhat com  | libxml GNOME XML XSLT toolkit  http://xmlsoft.org/
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