[Qgis-developer] adding layers to big project very slow

[Régis Haubourg]

Hi, 
When working with large projects in master, adding a new layer is sometimes
very slow, and seems sometimes to never happens.
Gui is still reactive thanks to new API, so the user tends to understand
that nothing happens, and tries to add several times the data.
When autoupdate is enabled in a composer legend, layer is really added. I
guess the issue is around layer registry. 
It does with "add layer" and is even slower with "duplicate layer" (layer
properties long to apply?). I also saw that using python plugin 'layer's
menu from project' before it got broken with SIP changes. 
Anyone confirms? 

Régis




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