Bug report #3388
Performance issue with new symbology
|Affected QGIS version:||master||Regression?:||No|
|Operating System:||RedHat||Easy fix?:||No|
|Pull Request or Patch supplied:||No||Resolution:||fixed|
|Crashes QGIS or corrupts data:||No||Copied to github as #:||13448|
I have some performance issues with the new generation symbology. Using a polygon layer r1 with a categorized symbology r1. Up to a scale to approx. 1:200 there are no issues and rendering is as fast as with the old symbology. But between approx. 1:200 - 1:1 it slows down and eating 100 % CPU for half a minute sometimes even longer. This does happen on several (RedHat, Ubuntu) Linux systems with different QT versions. On a Windows XP machine with OSGEO4W install there are no performance issue (but it fills the polygons black sometimes when zoomed in).
#5 Updated by cremat0rio - over 9 years ago
- Affected QGIS version set to master
- Crashes QGIS or corrupts data set to No
I have the same problem.
I'm using QGis 1.7.3 (the same happens on 1.7.1).
With a polygon layer, and the new symbology with levels.
QGis gets very slow and only uses one thread (it seems so), wich is strange nowadays with multicore processors.