[Qgis-developer] [WebClient] rule-based style SLOW

[bernhard.stroebl at jena.de]

Hi Martin,

thank you for the reply

Am 19.04.2012 14:36, schrieb Martin Dobias:
> On Thu, Apr 19, 2012 at 12:00 PM,<bernhard.stroebl at jena.de>  wrote:
>> Hi,
>>
>> I realized that using a rule-based style makes the client dead slow.
>> Normally the log shows a timeout on the server for qgis_mapserv.fcgi. If I
>> put the rules into the data source (postgres) and use a categorized style
>> the client performs as expected. The slowliness can only be experienced when
>> zooming or panning.
>>
>> I prepared an example (will be probably removed in a couple weeks):
>> http://map2.jena.de/kartenportal/test?format=image/png&visibleLayers=Stadtplan&lang=en
>>
>> after loading please activate one of the layers and zoom in on the colored
>> area in the south
>> rule-based style: loads forever (Navigation history brings you back)
>> categorized style: loads ok
>
> Is it slow also in QGIS desktop app or is it something specific to the
> QGIS server?

desktop is fast
and so is QGIS server; compare
http://map2.jena.de/wms/test?LAYERS=Stadtplan%2Ccategorized%20style&FORMAT=image%2Fpng&DPI=96&SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&STYLES=&EXCEPTIONS=application%2Fvnd.ogc.se_inimage&SRS=EPSG%3A31468&BBOX=4470654.5050516,5638947.4195052,4471988.6271692,5639432.5548208&WIDTH=1012&HEIGHT=368
and
http://map2.jena.de/wms/test?LAYERS=Stadtplan%2Crule-based%20style&FORMAT=image%2Fpng&DPI=96&SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&STYLES=&EXCEPTIONS=application%2Fvnd.ogc.se_inimage&SRS=EPSG%3A31468&BBOX=4470654.5050516,5638947.4195052,4471988.6271692,5639432.5548208&WIDTH=1012&HEIGHT=368

both are reasonably fast

>
>> if I enter the WMS request directly both layers load reasonably fast!?
>
> Then it is probably not a QGIS issue at all...?

I have no idea where the problem comes from because on my PC (running 
OpenSUSE 11.4) both layers are fast in QGIS WebClient

>
> In any case, sharing the project would help - to look for any anomalies.

what would you need? project and a dbdump? If you are willing to look 
into this I would send it to you with a PM.
>
> Martin


Bernhard


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