I tested my new game and it always lags, when a new Background part appears. For the Background i made a sprite in Photoshop (1024x8192)
and cut it in 8 parts to use the power of two. On Iphone 4 i have nearly constant 45 fps, but even when a new background part is loading, it
lags for about 100ms. Is it possible to load more background in advance?