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I am building an application that includes a UIWebView containing a large number of images, CSS, embedded video, and JavaScript tap handlers. Scrolling performance is stuttery and I am looking for insight into the most effective ways to improve this. Which if any of the following characteristics lead to laggy UIWebView scrolling? What other factors may be hindering performance? Quantity of images Should I be removing images from the DOM as the user scrolls past them, and adding them back if they scroll back up? Size of images Will Retina-quality images in a web view affect scrolling performance a lot more than smaller versions would? Image scaling Would resizing the images ahead of time make a big difference, rather than relying on the web view to scale based on declarations like width: 100%; ? CSS I have avoided box-shadow , but are there other CSS properties that are also known for adversely affecting scrolling performance? If there are any other resources or tools that can be used for profiling, I've love to hear about them.

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