Btw, is it possible to call computeMinMax() on demand, e.g. in QgsGDALProvider::minimumValue /maximumValue instead of the provider constructor?
It probably does not matter much for the desktop experience. However, for server throughput, avoidance of opening and parsing the aux.xml file could make a difference. Regards, Marco Am Dienstag, 9. August 2011, 21.46:45 schrieb Tim Sutton: > Hi Paolo > > Does it do that every time you load that layer or only the first time? > Does the filesystem permissions allow writing of gdal .aux.xml files? > > My raster stats branch merge changed some behaviours and it is > probably a side effect of that. One of the changes is that gdal gets > full stats when trying to determine the min max of a band. It will > fetch those stats quickly from aux.xml if present of if not its going > to do a full stats gather just for the basic min max stats which is > where you probably experience the slowness. I will see if I can find a > better way to do the basic min/max stats gathering. > > Regards > > Tim > > On Tue, Aug 9, 2011 at 3:49 PM, Paolo Cavallini <cavall...@faunalia.it> wrote: > > Hi all. > > With current master, I get bad performances in loading rasters (a <12Mb > > takes >5 sec); when double-clicking it from the QGIS browser, it is far > > slower (>20 sec). From the console: > > Warning: Object::connect: No such signal QgsGdalProvider::statusChanged( > > QString ) in > > /storage/build/Quantum-GIS/src/core/raster/qgsrasterlayer.cpp:2446 Any > > hint? > > All the best. > > -- > > Paolo Cavallini: http://www.faunalia.it/pc > > _______________________________________________ > > Qgis-developer mailing list > > Qgis-developer@lists.osgeo.org > > http://lists.osgeo.org/mailman/listinfo/qgis-developer -- Dr. Marco Hugentobler Sourcepole - Linux & Open Source Solutions Churerstrasse 22, CH-8808 Pfäffikon SZ, Switzerland marco.hugentob...@sourcepole.ch http://www.sourcepole.ch Technical Advisor QGIS Project Steering Committee _______________________________________________ Qgis-developer mailing list Qgis-developer@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-developer