Bug report #15499
Qgis Desktop 2.14.5 and 2.16 Projects with Multiple Composers Loading Very Slowly
|Affected QGIS version:||2.14.5||Regression?:||No|
|Operating System:||Win7 32 and 64 bit||Easy fix?:||No|
|Pull Request or Patch supplied:||No||Resolution:|
|Crashes QGIS or corrupts data:||No||Copied to github as #:||23423|
In QGIS versions 2.14.5>=It appears that each composer is being loaded into memory when the project is opened. This is happening whether or not the composers were open when the project was saved.
Opening a large project with nearly 100 map composers created with qgis 2.10 takes over 20 minutes with qgis versions >=2.14.5. The project opens on the same computer in 8 seconds when using QGIS 2.10.
When using smaller projects (17 composers) load time in 2.10 is 43 seconds. In 2.14.5 it is 93 seconds. I can replicate this issue in a project containing no layers by adding multiple composers to it.
Is there a setting that can be used to change this behavior or should I plan on sticking to older versions of qgis?
I have been experiencing this issue on Windows 7 computers both 32 and 64 bit versions. In every case I have used the standalone installers.
I have also posted this issue on the gis stackexchange board.
#1 Updated by Tobias Hurtienne over 4 years ago
've just read through this ticket. I have also the problem with the long load time in QGIS 2.14.6 LTR, if I load with lots of composers. In the LTR 2.8.9 Wien there isn't this problem. Time to load for 30 composers takes 15 minutes!
That's a big problem!
HELP! HELP! HELP!
#2 Updated by Bjoern Gessler over 4 years ago
Got the same problem as well under Linux, as under Windows 7 and 10. QGIS VErsion 16.3 and 16.1.
I got a project with about 15 Print composers, some of them quite large (about 60 x 90 cm). The QGIS-project has risen to a size of about 16MB, loading the project takes about 20 Minutes on a i5-3,4 GHz computer with 8 GB of RAM.
Also saving the project sometimes takes up to 5 minutes.
Makes working sometimes really annoying...
Guess this might be a major issue witch then could be more or less simply fixed by not loading all map layouts into the memory at start up.