The problem I'm having is that it does not appear that PNGs are decoded in the background in Webkit on iOS. Right now what I have is essentially a ScrollView. I have a div the size of the viewport with another div that scales with the content. I am scrolling the content div using a transition and translate3d to achieve GPU acceleration. The scrolling looks great. However the content is composed of images and they cannot all fit in memory at once so I am loading them on demand. The problem arises when I set the background-image css property to a locally stored PNG image and then attempt to scroll. I get a noticeable delay/jerkiness/hiccup as the image is decoded. Is there something I should be doing differently?
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