[Qgis-developer] QtXml is no longer maintained in Qt5

G. Allegri giohappy at gmail.com
Thu Dec 4 01:04:44 PST 2014

QtXml is really, damn slow. PyQt with QtXml is worst then lxml, just to
make a comparison. Switching to a streamlined xml parser would be
advisable, but I know it would a deep refactoring for a lot of QGIS's code.
Maybe it should be considered within the next big refactorings (geometry,
composer, etc.), but it won't be easy to find a sponsor specifically for

Il 04/dic/2014 09:45 "Nyall Dawson" <nyall.dawson at gmail.com> ha scritto:

> On 4 December 2014 at 19:25, Jürgen E. <jef at norbit.de> wrote:
> > Hi Matthias,
> >
> > On Wed, 03. Dec 2014 at 16:46:11 +0100, Matthias Kuhn wrote:
> >> I didn't look at it in detail and just based this recommendation on the
> >> one from the QtXml documentation linked at the end of the original
> message.
> >> Is there something in particular you think we will be missing? If so, it
> >> might be good to start looking for alternative ways to go.
> >
> > We could just keep using it and fork it if need be.  Any idea why it was
> > discontinued?
> >
> This link [1] suggests that it hasn't been discontinued, it's just
> unmaintained, and isn't scheduled for removal. That doesn't solve the
> PyQt5 problem though... It's also worth noting that QtXml is very
> slow, which is noticeable on project load/save.
> Nyall
> [1] https://bugreports.qt-project.org/browse/QTBUG-32926
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