Safari 3.0.4: 445ms
Webkit r28233: 207ms
(Tested on Dual Xeon Mac Pro 2.6GHz)
Webkit is an open source project that serves as the basis for Apple's Safari browser. Webkit's nightly builds offer end-users access to the latest (potentially unstable) Webkit updates. A number of other browsers also use Webkit and will also benefit from these improvements.