Opened 13 years ago
Closed 13 years ago
#3588 closed bug (fixed)
new raster provider: very slow
| Reported by: | lutra | Owned by: | rblazek |
|---|---|---|---|
| Priority: | major: does not work as expected | Milestone: | Version 1.7.0 |
| Component: | Rasters | Version: | Trunk |
| Keywords: | Cc: | ||
| Must Fix for Release: | Yes | Platform: | All |
| Platform Version: | Awaiting user input: | no |
Description
I'm testing the new raster capabilities of QGIS with bunch of big tiff rasters (> 1gb, sometimes > 2gb), with internal tiles and/or overviews.
What I'm seeing is that now those rasters take quite a *lot* (making qgis not responsive for a while) to be rendered, before the merge it was all *much* quicker.
As exemple:
on QGIS 1.6 a 1.7GB geotiff with tiles and overviews opens in (more or less) 1 sec., in trunk now takes (more os less) 1 minute!
After the raster show in the canvas, also opening its properties take a long time. Before the merge was immediate.
Zooming and panning it is also much slower than before the merge.
Overall it seems like that tiles and overviews are ignored or not read, but to me seems that also opening big tiffs (> 1gb) without internal tiles and/or overviews takes a *lot* more than before the merge.
fixed in r15418