I’m nearing the end of a Windows Phone 7.1 app that I’m writing. It’s a TV-related app and as such has a lot of images – so keeping RAM usage down is really important.
Visual Studio has a pretty awesome performance profiler for WP apps, and I suggest you use it frequently. So while checking my app’s memory usage I noticed something very worrying. Around startup the usage was ramping up to over 250MB- that’s massive for a phone app, and is waaaay over the 90MB limit to pass certification.