[Qgis-user] QGIS slower on new, faster Linux machine

[Marco Hugentobler]

> I believe it was fixed with a patched qt version in the windows
> version, but if you use the original qt packages from ubuntu, the fix
> wouldn't be present.

There is an improved clip directly in QgsClipper now, so the patched Qt 
version is not necessary anymore. And yes, the clip is only used with new 
symbology.

Regards,
Marco

Am Mittwoch, 17. August 2011, 21.44:01 schrieb Andreas Neumann:
> Hi,
> 
> I ran into similar issues with very large polygons. It was a clipping
> problem. I believe it was fixed with a patched qt version in the windows
> version, but if you use the original qt packages from ubuntu, the fix
> wouldn't be present.
> 
> Are you using old or new symbology? I believe the issue is not present
> any more in the new symbology.
> 
> If it still is - would you be willing to share the dataset with the
> geometry that causes the problem? Marco perhaps could have a look at it.
> 
> btw: your machine seems very powerful to me. It really shouldn't be a
> hardware issue.
> 
> Andreas
> 
> On 08/17/2011 08:47 PM, O wrote:
> > An update:
> > 
> > The problem seems to be with a single very long line layer (not sure how
> > many points: I have not yet sorted out how to count them).   When I zoom
> > out to see the whole line, one of my eight cores reaches 100% and memory
> > is nowhere close to being full, and QGIS grinds to a halt.
> > 
> > I have had nothing like this kind of trouble in the past running QGIS on
> > far less sophisticated hardware, although in all cases under Ubuntu or
> > Wubi-installed Ubuntu rather than Debian, and on machines with NVIDIA
> > cards. Contrary to what I said before, those machines had *less* VRAM
> > than I have now (I have 1GB VRAM), and I doubt if VRAM has anything
> > at all to do with issues of this kind.
> > 
> > I am running QGIS 1.7.0.
> > 
> > Any advice would be most welcome.
> > 
> > O
> > 
> > 
> > 
> > 
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