Performance testing from FavBrowser.com show’s the following performance tests for the various browsers running SunSpider JavaScript benchmark. Tests were run on a fresh install Windows XP SP3 machine with Firefox 3.0.4, Firefox 3.1 Beta 1, Opera, Safari, Google Chrome and the open source WebKit rendering engine.
Glad to see Firefox doing well
Performance: Firefox vs. Safari vs. Google Chrome vs. Opera.
