We've been hearing about the latest service packs from Microsoft for some time, but until recently, there have been no mentions as to how either performs. An independent researcher took test versions of both Windows Vista SP1 and Windows XP SP3 and pitted them against each other. What he found was astounding, to say the least. Vista SP1 at most points was no faster than the release version, and in some cases was twice as slow. However, XP SP3 was able to claim a very hefty performance boost from Vista SP1, and even XP SP2. If the beta performance carries over to the final versions, Microsoft will be making quite a pretty penny off of XP SP3, considering the massive performance gains seen at this time. Have a look at this very telling benchmark chart (Officebench, in seconds, less time is better).