title: Handling many image files in scrollview on iPhone similar to photos app
body: <p>So I've seen this question asked before and in fact I asked it last night but I thought I'd give it another go just to see if I could get any other unique views on the problem.</p>
  
  <p><em>The Problem</em> — I have an app with a large number of uiimageviews (with image downloaded to disk) in a scrollview which of course has two large problems facing it: Memory use, and performance. In my app memory use isn't so much a problem because I am employing techniques such as dequeuing and reusing imageviews and such. But performance is another thing entirely. Right now, as a memory saving procedure, I only store image filepaths in memory because it would be ridiculous to store images in memory. But the problem with this is that reading from the disk takes more time than from memory and slows down scrolling on the scrollview <strong>immensely</strong>. </p>
  
  <p>So, what kind of techniques do any of you suggest for something like this? I've seen three20 but don't want to use it because I need high customizability in my view and that just won't do. Image files are not large, but just thumbnail size so there is no scaling or excess size. There's got to be an intuitive way to handle this. The built in photos app handles up to thousands of photos perfectly with low memory and slick and smooth scrolling performance. </p>