[XML-SIG] PyDOM performance

[Mike Olson]

Out of curiosity I did a quick benchmark on the file you referenced and I was
rather suprised by the results.

Both tests where on a Celeron 366/ 128MB running linux.  Neither test performed
XML validation as I did not have a DTD.

4DOM was made with the orbless option and used the Ext.Builder.FromXmlFile
method.  the 4DOM version was from our cvstree which will be available by weeks
end.

Non validating 4DOM
Start:  935605414.575
End:  935605415.11
Delta:  0.535288095474

pydom is version 0.5.1 from the RPMs and used the utils.FileReader()

Non validating pydom
Start:  935605415.148
End:  935605418.212
Delta:  3.0643119812


I was quite suprised by this.  I don't know enough about the pydom internals to
explain why it is slower.  I just always assumed it was faster.

We will still be looking to speed up 4DOM with the C implementation of the trees.

Later
Mike

Mike Olson wrote:

> Carey Evans wrote:
>
> >
> >   And, is it worth doing anything to PyDOM, or would I be better off
> >   looking at 4DOM, for example?
>
> I don't think you will get much speed increase (infact it may be slower) with
> 4DOM.  We wrote 4DOM more conscerned with meeting the W3c spec to the letter
> then speed.
>
> One note, we are going to rewite all of the tree stuff in 4DOM in Red Black or
> avl tree in C by the end of the month or early next month which should give us
> some speed increases.  At that we will do some serious bench marks netween the
> 2 and work out a pythonic interface.
>
> Mike
>
> >
> > Thanks.
> >
> > --
> >          Carey Evans http://home.clear.net.nz/pages/c.evans/
> >
> >                "This is where your sanity gives in..."
> >
> >   ------------------------------------------------------------------------
> >
> >    dom-core.diffName: dom-core.diff
> >                 Type: text/x-patch
>
> --
> ----------------
> Mike Olson
> Consulting Member
> FourThought LLC
> http://www.fourthought.com http://opentechnology.org
>
> _______________________________________________
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--
----------------
Mike Olson
Consulting Member
FourThought LLC
http://www.fourthought.com  http://opentechnology.org