[QGIS-trac] [Quantum GIS] #2552: digitizing become very slow when a (fair big) underlying vector has snapping activated

[Quantum GIS]

#2552: digitizing become very slow when a (fair big) underlying vector has
snapping activated
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   Reporter:  lutra                             |              Owner:  nobody       
       Type:  bug                               |             Status:  new          
   Priority:  major: does not work as expected  |          Milestone:  Version 1.5.0
  Component:  Vectors                           |            Version:  HEAD         
   Keywords:                                    |   Platform_version:               
   Platform:  All                               |           Must_fix:  No           
Status_info:  0                                 |  
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 I believe that this is replicable with a sample data of yours, but in case
 you are not able to reproduce just ask and I'll attach a sample.

 Steps:

 add a polygon layer, with a fair big number of features and enable
 snapping for it.

 then add another polygon layer or create a new one.

 start editing the new polygon layer, you'll notice that the "capture
 polygon" tool is pretty slow. Depending on how big is the underlying layer
 it can be almost unusable.

 remove the snapping for the underlying layer and editing the new polygon
 will work just fine


 tested under trunk/1.4 under both linux and windows

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Ticket URL: <https://trac.osgeo.org/qgis/ticket/2552>
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