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Adobe Photoshop CS3 series
To upgrade or not to upgrade: that's generally the question when confronted with a new version of Photoshop. And, at least for 2007, the answer is an emphatic "yes," if only because of several extremely useful new enhancements that should benefit most users, as well as improvements in performance to benefit all. Furthermore, if you traditionally use Photoshop for video postproduction tasks, 3D texture-map editing, or scientific image analysis, there's a whole new--and pricier--version of Photoshop for you, dubbed Photoshop CS3 Extended.
From loading to saving, Photoshop CS3 generally operates faster than Photoshop CS2. There is one performance caveat for the CS3 suites as a whole: it's the slowest, most painful installation I've experienced in years, and that includes bloatware like Microsoft Office 2007. Thankfully, you only have to do it once, maybe twice. Once you've snailed your way through it, though, it settles into the back of your memory like the 10 miles of construction that blocked your commute home for a few hours.
The improvement in start-up time alone may be worth the price of admission. A cold load under Mac OS X 10.4.9 (running on a tricked-out octocore--two quad-core, 2.66GHz Intel Xeon CPUs--system equipped with an ATI X1900 XT card, 2GB of RAM, and many hundreds of gigabytes of free hard disk space) ran about six times faster than CS2, and when I'd already launched and closed the app before in the same session, it seemed to cache pieces, making the launch more than 36 times faster. The Mac version shows exceptional speed gains across the board, as well. CS3 ran the CNET Labs Adobe Photoshop image-processing test almost 60 percent faster than CS2. Surprisingly, the Mac version ran CS3 significantly faster than Windows; it took more than twice as long under Windows Vista, and I estimate just under twice as long on Windows XP. I extrapolated based on previous CNET Labs' tests showing that Photoshop CS2 runs about six percent slower under Vista than under XP and on data we have for Photoshop CS2 on the same test bed running Windows XP. Take it all with a grain of salt.