[GRASS-user] how to speed of map generation with ps.map?

[Tim Michelsen]

Hello,
for my current project I would like to create some postscript maps.

When I run ps.map it takes a lot of time. I use a DEM as raster layer 
and country borders as vector layer on top of it.
The DEM covers two SRTM tiles.

Is there any way to speed the process up?
How do I best set the resolution to get a nice looking map but also save 
file size and processing time?

Thanks for your help in advance.

Regards,
Timmie