[GRASS-dev] wxpython gui: speed of display

[Moritz Lennert]

Hello,

While we are working on a new wxpython prototype, I would like to 
mention raise the issue of speed of display (which is also valid for 
gis.m).

When I display a vector map with 65961 boundaries and 20464 areas, it 
takes about 10 seconds to display it with type=area and fcol=none (ca 
13s with no parameters set). In ArcView under Windows this takes only 
max 3s.

I was wondering where the difference comes from. Is it the passage 
through g.composite ? Is it the fact that we are not dealing with simple 
features ? Something else ?

Most of the work done here in my department is with vector maps and if 
responsiveness is not there, this is one argument for those against 
switching our work entirely to GRASS.

So maybe this stage of gui development is a good moment to think about 
this ?

Moritz