Those from cNET The UK had the opportunity to play with an iPad 2 tablet and ran the SunSpider JavaScript test that measures the speed of loading web pages. As you already know, iOS 4.3 has implemented the Nitro Javascript engine for Safari, which should significantly improve the speed of page loading and internet browsing respectively. In cNET's tests, the iPad 2 with iOS 4.3 is 4 times faster, in terms of loading pages, than the iPad with iOS 4.2.1. After installing iOS 4.3 GM on the iPad, the difference between the 2 tablets was significantly reduced, the iPad 2 being only 1.5 times faster than the iPad.
In the case of iPhone 4, the situation is different, iPad 2 with iOS 4.3 loads web pages 2 times faster than iPhone 4 with iOS 4.3. Google Nexus S and Samsung Galaxy Tab were "cornered" by iPad 2 and Safari, which loads pages 3 times faster than Nexus S and 3.5 times faster than Samsung Galaxy Tab. iPhone 4 with iOS 4.2.1 loads web pages 5 times harder than iPad 2 with iOS 4.3, so in tests iPad 2 looks good, in reality the difference is not extraordinary. Web pages will load faster, of course, but it depends a lot on the page itself. Not all pages are sufficiently optimized for Safari to be able to open them as quickly as we would like.
