Apple has issued a statement to The Register confirming reports and rumors stating that iOS web apps and embedded web views in iOS applications are throttled and run twice as slow as Safari.
iOS 4.3 includes a new “nitro” web processing engine, which promises to run java script twice as fast as earlier versions of iOS Safari. According to Apple’s iOS feature page:
The only affected users would be users of third-party web browsers that utilize the web engine that Apple provides to developers in Xcode. Full-screen web applications that launch from the iOS homescreen are, of course, affected as well.
We presume that Apple has left out asynchronous mode of execution and other HTML5 goodies, too.
Apple spokesperson Trudy Miller confirms:
Apple does not provide a reason as to why this is the case but here is our speculation from the other day:
