The Register is reporting that web apps saved to a user’s iOS 4.3 homescreen (remember that feature?) are experiencing performance issues, especially when compared to loading the app in Safari from a cold start. Additionally, the saved web apps don’t take advantage of HTML 5 web caching, so they can’t be used offline. Here’s a […]
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Web Applications Saved to iOS 4.3 Homescreen See Performance Issues

iphone-4-low-signal.jpgThe Register is reporting that web apps saved to a user’s iOS 4.3 homescreen (remember that feature?) are experiencing performance issues, especially when compared to loading the app in Safari from a cold start. Additionally, the saved web apps don’t take advantage of HTML 5 web caching, so they can’t be used offline.
Here’s a long-winded excerpt:

If a web app is run from the iOS 4.3 home screen – in other words, if it is saved to the screen alongside local apps downloaded from the Apple App Store – it runs roughly two to two and a half times slower than it does in the browser, according to various tests. It appears that whereas Apple has updated the iOS 4.3 Safari browser with its high-speed Nitro JavaScript engine, Nitro is not used when web apps are launched from the home screen.

“Essentially, there are two different JavaScript engines,” says Alex Kessinger, a mobile application developer and blogger who has focused on building web-standards-based apps for the iPhone. “They’re not using the new JavaScript engine with applications that launch from the home screen.”

The innocent view of this issues, is that it’s a bug, and Apple should fix it. The more cynical view, is that Apple is deliberately hampering web apps coax users to use App Store applications.

Apple is reportedly aware of these problems, due to developer bug reporting, and will work to fix at leas some of the issues.

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