Although Google Chrome is already in the speed lead when it comes to speed browser construct and modify items on the web, this does not mean that there is no room for major improvements.
A new beta version of Chrome 4 was made available yesterday. In the DOM Core-oriented tests in Mozilla Dromaeo-suite to the new beta version deliver up to 30 percent better than the Chrome 3 Compared with the first official version of Chrome will be performance improvements of 400 percent.

From before the site such functionality built in, while the browser add-Xmarks offers synchronization of bookmarks across Chrome, Firefox, Internet Explorer and Safari.
A more detailed description of how the synchronization feature in Chrome works, are on this page.
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