In our tests, we found that doing so results in modest performance improvements. You can disable much of the DMW by switching to the Windows Classic theme. This frees the CPU for other things, but exerts a penalty on graphics-intensive applications. When enabled, all OpenGL and DirectX content passes through the DWM. According to Ian Williams, senior applied engineer at NVIDIA and chair of the SPECopc project group (the developers of the Viewperf benchmark), “Because Aero is tightly integrated with the GPU, it is essentially a complete 3D application in itself, using much of the GPU’s capabilities and horsepower.”įigure 2: Vista constantly asks users for permission to continue, such as when installing new software.Īero actually competes with other applications for GPU resources. Most Aero features such as transparent windows, animated icons, and application preview are the result of its underlying Desktop Window Manager (DMW) architecture. Like it or not, Vista’s Aero interface is more than skin deep. Glass gets in the way: Microsoft surely had many reasons to change the appearance of its operating system-unflattering comparisons to the Mac OS come to mind.Of course, you may need to buy a new version of the software. But most applications are now Vista compliant if not fully certified for Windows Vista. Incompatible Software: Applications performed slowly (if at all) because they weren’t designed to run under Vista.When it first arrived, Vista was sluggish compared to XP, largely for three reasons. Now that we’ve gained some experience (and almost all new systems come with Vista pre-installed), we felt it was high time to take a more in-depth look at the operating system and its likely impact on DE readers. Peripherals lacked drivers.īut those were the early days. Some programs needed to be patched or required entirely new versions. Early adopters reported significant speed degradation, particularly when running CAD applications. Much has been written about Windows Vista since the operating system was first released at the end of 2006-much of it unfavorable in terms of performance.
Figure 1: Graphic benchmark results using SPECviewperf, comparing Windows XP and Windows Vista.
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