[QGIS-trac] [Quantum GIS] #3200: Feature cache

[Quantum GIS]

#3200: Feature cache
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   Reporter:  wonder                            |              Owner:  nobody       
       Type:  enhancement                       |             Status:  new          
   Priority:  major: does not work as expected  |          Milestone:  Version 1.7.0
  Component:  Build/Install                     |            Version:               
   Keywords:                                    |   Platform_version:               
   Platform:  Debian                            |           Must_fix:  No           
Status_info:  0                                 |  
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 It would be nice to have caching of features within vector layers. With
 caching, we could speed up the rendering by not fetching the data from
 (slow) data source on every render and store the features for some time in
 the memory.

 Attached patch has been developed about more than one year ago as a first
 attempt to add this functionality to QGIS. It will have to be modified in
 order to be usable with current svn trunk. It has been shown with the
 patch that 2x speed up can be achieved (and maybe more). The patch also
 needs more testing / improvements as it modifies various areas within the
 core.

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Ticket URL: <http://trac.osgeo.org/qgis/ticket/3200>
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Quantum GIS is an Open Source GIS viewer/editor supporting OGR, PostGIS, and GRASS formats