I've only had very slight problems with TS12. Not enough to start looking for better performance. With my old flight sim, I would type in msconfig in the start box. I could see everything that was running at start up. I unticked everything except for sound and 2 Nvidia entries. I'm not really sure if this helped, but I believe it may have. My pc was offline at that time. That old flight sim (CFS2) could really cause performance problems, once you started adding to it. It was working very well with those 3 items being the only things running on the start up menu. I have never owned a laptop, so I don't know if this would help you. 
Cheers.....Rick