Bug report #18487
Print composer extremely slow outputting PDF's
|Affected QGIS version:||2.18.9||Regression?:||Yes|
|Operating System:||Windows 7 Enterprise (Service pack 1) 64-bit, 16GB Ram, Intel core i7-4800MQ 2.7GHz||Easy fix?:||No|
|Pull Request or Patch supplied:||No||Resolution:|
|Crashes QGIS or corrupts data:||No||Copied to github as #:||26375|
I'm using QGIS version 2.18.9. When outputting an atlas as PDF's performance is terrible. I spent hours yesterday trying to output 48 pdfs from an atlas suffering multiple crashes. Whilst searching on here I found similar issues reporting the same thing and people also reporting that it was working in a previous version of QGIS. I tried with version 2.16.3 and did not suffer the same performance issues. Some numbers for you:
QGIS V2.16.3 - Outputting 48 no. PDFs as Raster took 5 minutes.
QGIS V2.18.9 - Outputting the same PDFs as Raster started 40 minutes ago and is only up to number 39.
I also noticed that before I selected output as Raster the file size was 4x bigger in 2.18.9 as it was in 2.16 approximately 100mb as opposed to roughly 25mb.
Unfortunately I cannot share the data due to the project I am working on. As an example of the data set I have in the project here are some stats:
There are 200 vector layers, mainly GeoDB files with a few shapefiles.
There are 282 background raster images from ordnance survey open data. (display controlled by the scale)
#1 Updated by Nyall Dawson over 2 years ago
- Status changed from Open to Feedback
There's really not enough info here for any meaningful debugging... I'd suggest trying with no plugins, testing on a different machine, remove layers one by one, etc and see if you can narrow down what causes the issue. It's not a common issue.
#2 Updated by Simon McGowan over 2 years ago
That's fine. I've made you aware that somewhere between 2.16.3 and 2.18.9 there is a problem. It works as expected in 2.16.3 so I will use that version for my work, unfortunately I haven't got time to trial and error every layer I have.
It finally took 55 minutes to output the PDFs by the way. 2.16 for the win!