While working on modelling a 4 storey apartment complex, my model suddenly became increasingly slow, coming to the point where absolutely any command whatsoever now freezes everything for about 5 minutes. I figured it wasn't just my machine, as I have a fairly new desktop with 24gb ram, 3.2 i7 CPU, and the works to go with it.

I discovered that even though I am only a little more than a day into the model, I have 12,173 component definitions showing up in my "model info" "statistics" panel, when I would expect it to be closer to 200. Any ideas about what might be going wrong or how I can fix it?

I've been using SketchUp for 4 years now without running into this problem. I've always tried to keep my models clean and organized, so I'm not sure what is going on at all.