I have a Windows Phone 8 app that uses a lot of images in LongListSelectors that sit upon a Panorama control. After a lot of optimization, I managed to get my memory utilization to hold steady around 80MB or less in WVGA mode. I read that WP8 apps should not exceed 90MB. However, when I switch to the 720p or WXGA mode, the memory usage jumps to 120MB.
Is the 90MB limit something I need to worry about on the phones that support the higher resolutions?
If so, should I mark my app as WVGA-only in the Windows Phone store?
Is there anything I can do to eliminate this memory jump in the higher resolutions?