Hi Andrew,I do the folllowing test:
1.Open qcad3, the program load fast, I have a 128G SSD driver, it load less than 5 seconds;
2. The menu act very fast, it's the same as other qt applications on my system.
3. Draw lines, circles, polygon are fast.
4.Opening dwg or dxf files is slow, specially big files. I open a file about 1.5mb, it's slow to open it compare to other cad program.
5.The most important, the zoom and pan are very slow, even small files in draft mode, is somewhere can set up the refresh speed or zoom speed(like autocad can set zoomfactor for zoom)?
6. I'm using a 8 core xeon cpu, 2.6g, 4g ram, nvidia gtx470 card, linux driver270.41.19, 64bit linuxmint 11
thanks, sorry for my bad english.