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Apple Disputes Browser Speed Findings, Says Mobile Safari's the True Contender
An anonymous reader writes "Apple has hit back over claims that the browser shipped with its iPhone, iPod Touch, and iPad devices is significantly slower than Android's equivalent, calling the independent testing 'flawed.' 'They didn't actually test the Safari browser on the iPhone,' Apple's Kerris argues. 'Instead they only tested their own proprietary app, which uses an embedded Web viewer that doesn't actually take advantage of Safari's Web performance optimisations.' This, claims testing firm Blaze.io, is news to the world. 'Embedded browsers are expected to behave, for the most part, the same as the regular browser,' the company stated, defending its methodology. 'However, Apple is now stating that their embedded browser, called UIWebView, does not share the same optimisations MobileSafari does.'"
Presumably Apple is happy that, being the people who wrote the entire OS in the first place, they can implement this behaviour securely in Safari. They don't have the same faith in giving that ability to any random app developer, who could end up creating a difficult to spot vulnerability via the API either by malice or ignorance.
4.3 has address space randomization , which is why the pwn2own exploit doesn't work any more.