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iPad 2 and iOS 4.3 Javascript benchmarks show big performance gains

Some of the first speed tests coming in show that hardware and software improvements in the iPad 2 are giving it decent performance gains over its predecessor — and over rival devices.
CNET UK decided to spend its brief hands-on time with the iPad 2 by running the SunSpider JavaScript Benchmark, which CNET calls “an increasingly important indication of overall performance. The better a phone or tablet is at dealing with JavaScript, the faster more complicated websites such as Facebook will run, which means your whole experience with the device will feel faster.”
CNET found initially that the iPad 2 is up to four times faster than the original iPad, but not all this speed improvement is down to the upgraded hardware. The speed advantage dropped to a 1.5x boost when CNET updated the original iPad’s OS to a beta version of iOS 4.3 it happened to have lying around. This could be good news for anyone who wants an original iPad just for web surfing. Heavy discounting to clear stock means you can pick one up for $100 less than this time last week, a bargain if you don’t want the cameras and other goodies the iPad 2 brings.
The other good news is the boasting rights this will give you over owners of rival Android hardware; iPad 2 cleaned the clocks of the Galaxy Tab (3x faster) and the Google Nexus S smartphone (also 3x faster). Since it will also be getting the iOS 4.3 update, the iPhone 4 will be 2.5x faster.