Hi Everyone: I'm now working on a interactive storytelling project on iPad using Webkit. Imagine there is a large retina image (maybe 8k x 2k resolution), and I'm trying to allow user to pan around the image and tap some highlight objects to interact. The problem is, it is very sluggish on my iPad 4. Some areas are repainted and it just stick there when I start swiping. I tried to use the GPU rending trick (translate3d) but it hardly help. I checked Google map, It's hardly called smooth either. There is no WebGL support till now on iOS 7. Do anyone have any ideas? Or is it just impossible unless I resize the image?