You may have heard that selected testers received a pre beta of Vista SP1. Unfortunately, I don’t belong to this illustrious circle. But the APC magazine already has a review. James Bannan, the author, reported that the performance has noticeably increased.

It seems that it has nothing to do the with the recently released performance update, even though it is also part of SP1. Bannan claims that Vista’s code has been optimized ever since it was released. The performance improvement is also not related to the kernel update, it seems, since the version number of this build is still 6.0.6001. There has been speculation that Vista SP1 will get the same kernel version as in Windows Server 2008 which is 6.1.

The more information is leaking about this service pack, the more I think that it makes sense to wait until its final release. It’s not only that the performance could be better, but this SP might contain changes that were not available before as updates. So all the compatibility tests you are running now might turn out to be useless and you will have to start from scratch when this SP comes out.

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