Bug report #11981
qgis-bin.exe runs forever (or very long) adding vector file
| Status: | Closed | ||
|---|---|---|---|
| Priority: | Normal | ||
| Assignee: | - | ||
| Category: | - | ||
| Affected QGIS version: | 2.6.1 | Regression?: | No |
| Operating System: | Easy fix?: | No | |
| Pull Request or Patch supplied: | No | Resolution: | up/downstream |
| Crashes QGIS or corrupts data: | No | Copied to github as #: | 20187 |
Description
I've got an 8MB uncompressed E00 vector file. When I attempt to add it into the project, qgis-bin.exe runs for a very long time (5 minutes and counting) using only a single CPU core. I know there is a configuration option for using multicore for rendering vectors and I have enabled this, but it doesn't seem to help with whatever is blocking the load operation.
I have a 2MB uncompressed E00 vector file, and this one loads fairly quickly (5 seconds) so I think something odd is going on with the 8MB file. I would expect it to take at most 4x longer to load (say 20 seconds).
History
#1
Updated by Gili Tzabari over 9 years ago
Having read http://marc.info/?l=gdal-dev&m=121323053222337 I used avcimport to convert the file format and tried again. The converted file opened within 10 seconds.
Suggested behavior: If a user tries opening a large E00 file, warn that performance will be extremely poor and suggest conversion using avcimport ahead of time.
Better yet, convert using avcimport seamlessly under the hood.
#2
Updated by Gili Tzabari over 9 years ago
[please ignore, duplicate comment]
#3
Updated by Giovanni Manghi over 9 years ago
- Resolution set to up/downstream
- Status changed from Open to Closed
so it is the gdal/ogr driver that is slow handling such files, not qgis. About the warning: it could be a good idea, file a feature request for that. Cheers!
#4
Updated by Gili Tzabari over 9 years ago
Done. See http://trac.osgeo.org/gdal/ticket/5815