[Qgis-user] Very slow performance with large SHP files, with over 200k objects

[Andreas Neumann]

 Shouldn't the rendering speed of complex projects be improved with the 
 upcoming threading improvements of Martin? At least in the case where 
 are multiple layers in one redraw?

 Andreas

 On Wed, 09 Mar 2011 08:24:42 +0100, Paolo Cavallini wrote:
> Il giorno mar, 08/03/2011 alle 19.16 +0100, Agustin Lobo ha scritto:
>> At least regarding the vector operations (ftools), it seems that the
>> slowness is because of python code. During
>> FOSS4G in Barcelona we raised the question of rewriting all that 
>> part in c++
>
> I think the main issue is with the rendering of large and complex
> vectors. If one analysis is slow, people can live with, but if 
> loading,
> panning and zooming their layers takes tens of seconds, QGIS is 
> simply
> unusable for them.
> I think this is a real stopper for wider adoption of QGIS in bigger
> organization. Of course adding indices helps a lot, and there a re a 
> few
> more tricks to speed things up, but it is still an issue.
> A possible topic for the next QGIS meeting?
> All the best.

-- 
 --
 Andreas Neumann
 Böschacherstrasse 10A
 8624 Grüt (Gossau ZH)
 Switzerland