shotwell, resources

I just wonder if i have my system wrongly installed, or if thats an issue with shotwell.
If i import a folder with moderate count of images, my cpu will be at 10%, memory by 97% and swap by 76%.

My mouse really hangs then and i actually have to wait until everything is done.
Any suggestions?

cpu is a e8500 with 4GB ram… and swap is 4 Gb. filesystem is reiser.