Friday, April 4, 2008

iPhone's Beta Safari Boosts JavaScript Rendering Speeds

With the iPhone 2.0 beta firmware leaked, more is being learned about its overall performance. One interesting detail found recently pertains specifically to the new version of Mobile Safari included with the download. Apple has dramatically boosted it's performance with executing JavaScript.

According to a test run using Celtic Kane’s benchmarks, the iPhone's previous 1.x firmware's version of Safari clocked in at around 30 times slower than 1.83 GHz MacBook Pro, with iPhone-generated test times in excess of 9000 ms on average. However, the Safari included with v2.0 beta clocks in at just over 6000 ms on the same test, nearly 3000 ms faster than before. One possible reason is that it uses an updated version of WebKit, build 525.15.

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