[XML-SIG] Specializing DOM exceptions

[Mike Olson]

uche.ogbuji@fourthought.com wrote:
> 
> > On Sat, 23 Dec 2000 uche.ogbuji@fourthought.com wrote:
> >
> > > Seriously, after a quick survey of my code, the only place I import Node is in
> > > order to get at the constants.
> >
> > Yup, I noticed this in 4Suite code, and I kept wondering about the
> > rational of doing so, since almost every object you manipulate _is_ a
> > node, and therefore has access to the class attributes.
> > In other words a typical line of code is:
> > "if some_node.nodeType == Node.ELEMENT_NODE :"
> >
> > Is there a difference in performance with:
> > "if some_node.nodeType == some_node.ELEMENT_NODE :" ?
> 
> Nope.  It's all about developer's intertia, AKA cutnpasteitis.


Actually there may be a small performace advantage doing it they way it
is done.  Looking it up from the instance it will have to look into
atleast 3 dictionaries to find the value, while looking it up from the
class itself it will only have to look into one dictionary.  (though
this theroy is untested)

Mike


> 
> --
> Uche Ogbuji                               Principal Consultant
> uche.ogbuji@fourthought.com               +1 303 583 9900 x 101
> Fourthought, Inc.                         http://Fourthought.com
> 4735 East Walnut St, Ste. C, Boulder, CO 80301-2537, USA
> Software-engineering, knowledge-management, XML, CORBA, Linux, Python
> 
> _______________________________________________
> XML-SIG maillist  -  XML-SIG@python.org
> http://www.python.org/mailman/listinfo/xml-sig

-- 
Mike Olson				 Principal Consultant
mike.olson@fourthought.com               (303)583-9900 x 102
Fourthought, Inc.                         http://Fourthought.com 
Software-engineering, knowledge-management, XML, CORBA, Linux, Python