wimagguc/ios-custom-alertview — pull request #20 by kwent (2013-11-04 07:08:42+00:00)
Title: Optimizing performance for older devices.

- Adding a shadowPath give a huge performance boost for older devices (Iphone < 5).

- On default a CALayer draws a shadow during animations, adding `shouldRasterize` & `rasterizationScale ` allows you to cache the shadow as a bitmap and reuse it instead of redrawing it.