title: Fastest way to do shadows on iOS?
body: <p>QuartzCore .layer.shadow's suck up performance. They appear to need to be re-rendered every time something changes, causing everything to lag.</p>
  
  <p>Coregraphics gradient (for 1 way shadows) - doesn't look right. if your gradient goes from 0.3 alpha to 0, it has some odd effect where you can 'see' it stop. It just doesn't look nice, or natural. Maybe it isn't dithered, but I'm sure I heard core graphics gradients are. It's odd, I don't know.</p>
  
  <p>Coregraphics shadow - take a while to render as you set them, but otherwise great performance. It's just that second you're waiting for a view to appear because it has to render it's shadow first, that's the problem.</p>
  
  <p>So I must be missing something. Is there another method which looks right, and is speedy both in rendering time and in performance?</p>