[Qgis-developer] slowness reading shp

[Barry Rowlingson]

On Sat, Feb 19, 2011 at 4:26 PM, Giovanni Manghi
<giovanni.manghi at gmail.com> wrote:

> I made my own tests:
>
> on trunk with a big 600mb (43000 features) polygon shapefile, the vector
> opens in 32 seconds (new symbology, with borders, anti-aliasing
> disabled).

 Just a quick note that 'big' for a shapefile could be in any of three
dimensions:

 1: Lots of features
 2: Lots of points in each polygon or line feature
 3: Lots of attribute data in the .dbf

Now, #3 shouldn't affect shapefile rendering speed (but will have on
loading speed)/ #1 and #2 will affect the speed but in possibly
completely different areas of the code.

Barry