Here are SunSpider benchmark results:
More is better (SunSpider runs per minute).
Overhauled web inspector
Ability to save websites as a desktop application
Full page zoom
CSS animation, gradients, masks, reflections and transform support.
More options for new windows and tabs
Also, it passes Acid 3 test. More Safari 4 features should be revealed within the upcoming releases.
You can try Safari 4 yourself, if you are a registered developer.
About (Author Profile)
Vygantas is a former web designer whose projects are used by companies such as AMD, NVIDIA and departed Westood Studios. Being passionate about software, Vygantas began his journalism career back in 2007 when he founded FavBrowser.com. Having said that, he is also an adrenaline junkie who enjoys good books, fitness activities and Forex trading.