from CNET News.com

Vista’s first service pack, to be released early next year, is intended to boost the operating system’s performance. However, when Vista with the Service Pack 1 (SP1) beta was put through benchmark testing by researchers at Florida-based software development company Devil Mountain Software, the improvement was not overwhelming, leaving the latest Windows iteration outshined by its predecessor.

Vista, both with and without SP1, performed notably slower than XP with SP3 in the test, taking over 80 seconds to complete the test, compared to the beta SP3-enhanced XP’s 35 seconds.

Vista’s performance with the service pack increased less than 2 percent compared to performance without SP1–much lower than XP’s SP3 improvement of 10 percent. The tests, run on a Dell XPS M1710 test bed with a 2GHz Core 2 Duo CPU and 1GB of RAM, put Microsoft Office 2007 through a set of productivity tasks, including creating a compound document and supporting workbooks and presentation materials.