Safari 4 Beta sprinted from the gate with a claim to being "3x faster than Firefox" at JavaScript rendering. We're calling Apple's ante and updating our browser speed tests with the latest builds. As in our previous speed tests, we're looking at a few key factors that the average browser user notice...

The Windows 7 beta offers a speedier startup than its predecessor: for me the beta boots to a fully functional desktop in under 30 seconds, faster than the preview or Vista. On the same exact computer, where I'm triple-booting Vista, XP, and now the Windows 7 beta (build 7000), I ran a set of startu...