Performance poor

I have installed DraftSight on several computers of my company, in order to have users feed-back about the program.

ALL of the users complain about performance problems when drawing. For example, the mouse pointer is very slow, also when they trace a line, ecc. If they use Autocad LT on the same pc and working on the same file, the performance are excellent.

Consider that we use workstation with 4GB of RAM, processor Intel Dual core i5-660 3,33 GHZ