c# - Memory consumption on Windows Phone 8 is 3 times what is on Windows Phone 7 -

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i'm developing app runs on both wp7 , wp8. after finished started running performance analysis improve app overall performance.

the app written wp7, have projects run on wp8 add features in-app-purchase, lockscreen , on.

when ran memory analysis on wp7, app averaged 50mb of ram throughout execution, acceptable value, weird thing when ran same xap on wp8 device app uses on average 150mb of ram.

i searched around web , found nothing related issue.

i used lumia 800 , lumia 510 make analysis on wp7., , use lumia 520, 820 , 925 make analysis on wp8 devices.

i'm using visual studio 2012.

i considered bug on vs2012, app crashes on lumia 520 (with out of memory, after while) never crashes on lumia 800 or 510.

the app heavy on images, of them exact size used on phone (never more 50 100x100 jpg pictures displayed in app @ same time).

any suggestions , solutions welcome.

edit: memory differences i'm talking running home view, performance analysis test simply, launch app swipe controls (i have pivot 2 items) , close session. there no navigation involved. i'm using raddataboundlistbox, tried change listbox , longlistmultiselector without significant memory consumption change


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