Bug report #15796
OTF CRS Transformation of 1-bit tif raster grids in 2.18.0 is very slower than one in 2.16.3.
| Status: | Closed | ||
|---|---|---|---|
| Priority: | Severe/Regression | ||
| Assignee: | - | ||
| Category: | Projection Support | ||
| Affected QGIS version: | 2.18.0 | Regression?: | No |
| Operating System: | Easy fix?: | No | |
| Pull Request or Patch supplied: | No | Resolution: | |
| Crashes QGIS or corrupts data: | No | Copied to github as #: | 23716 |
Description
Platform: Windows 10 x64
Version: 2.17-dev x64, 2.18.0 x64, 2.19-dev x64
If raster grids are in a UTM projection and I change the CRS of project file to WGS84,
the rendering of viewport in v2.17-dev, v2.18, and v2.19-dev become very slow as 3000+ ms.
This isn't reproduced in v2.16.3, the viewport can be moved as swiftly as normal.
The attachment is a simple tif grid (with separated worldfile) which you can import as any UTM CRS
then change the project CRS to WGS84 to reproduce this issue.
Associated revisions
Remove per-pixel debug msg slowing down reprojection (fixes #15796)
Even at level 5, the debug string would still be built and thrown away,
and affects both debug builds and RelWithDebugInfo (used for windows -dev builds).
Remove per-pixel debug msg slowing down reprojection (fixes #15796)
Even at level 5, the debug string would still be built and thrown away,
and affects both debug builds and RelWithDebugInfo (used for windows -dev builds).
(cherry picked from commit db0e7d57218f29dd5a6f386b8b4ce40f11a3ab59)
History
#1
Updated by Anita Graser about 8 years ago
- Priority changed from Normal to Severe/Regression
- Category set to Projection Support
#2
Updated by Martin Dobias about 8 years ago
- Status changed from Open to Closed
Fixed in changeset db0e7d57218f29dd5a6f386b8b4ce40f11a3ab59.