FWIW, this will be history starting with iOS8: http://9to5mac.com/2014/06/03/ios-8-webkit-changes-finally-allow-all-apps-to-have-the-same-performance-as-safari/

FWIW, this will be history starting with iOS8: http://9to5mac.com/2014/06/03/ios-8-webkit-changes-finally-allow-all-apps-to-have-the-same-performance-as-safari/ http://9to5mac.com/2014/06/03/ios-8-webkit-changes-finally-a... Now the web view runs in a separate process with a separate sandbox, so it can run the same JIT of Safari without security concerns (mainly, writable memory with execution permissions).