Its been awhile since I put up a blog post and that’s partly due to being so busy working on my two Windows Phone 7 Apps. Which brings me to the topic of this post and one which I think is important for fellow devs to understand. I am one of the lucky few that have received a real device and its very nice! :)  (thanks Microsoft!)

One of the first things I started to do was performance test my App on the device and found that the device is a lot slower than the emulator. So I started to run some optimizations and wrote a small benchmark App to help me work out which refactorings were the fastest. I was rather pleased with myself when I ended up getting improvements of 200 and 300%! in the emulator. Then thought I’d see how much of that new gain transferred to the device. The results shocked the hell out me, as rather than getting a gain I ended up with a lost of 50%! That’s right my optimizations did the exact opposite of what they were supposed to do.More...