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That post is incorrect, from what I can tell. Home screen shortcuts to "web apps" that hide the Safari UI (which are actually run in the hidden "Web.app" application) now have Nitro with iOS 5, but App Store apps do not. This is because a JIT requires memory to be both writable and executable, which is not generally allowed on iOS (without specific permissions that only Apple can use).

Yes (the article is incorrect). Native apps (that aren't Safari) don't have JIT.

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