My game currently runs at above 55 FPS on a Lumia 820 (WVGA, 800 x 480). However, on a Lumia 920 (WXGA, 1280 x 768), it runs below 20 FPS. That is a huge difference. Both phones share the same hardware, the 920 only has a bigger screen with higher resolution. I guess that is the problem?
I suspect it may even run slower on a 720p device like the HTC 8X.
My game scene is a 1200x1200 map, using tiled background (128x128). On the map, there are above 10 objects (64 x 64 or 48 x 48)
I have tried to hide, and disable all objects' collision when they are not on screen.
Do you have any advice to keep it runs smoothly on higher resolution device?
Btw, I found others are having the same problem too.
@thehen: Have you tried your game on the lumia 920? How is the performance compare to the 820?