I see a comparison: Windows XP vs Vista vs Windows 7
There are two key takeaways from the above data points. First, the workloads still run much slower on Vista than on XP. This is true for both dual- and quad-core systems. Second, Vista scales better than XP when moving from two to four CPU cores. This is demonstrated by the way that Vista closes the performance gap with XP as you increase the core count. Taken to its logical conclusion -- and disregarding for the moment external factors, like bus speeds, I/O contention, and memory latency -- Vista would ultimately overtake XP when the core count reaches between 32 and 64.
For example, when viewed under the same processor-utilization parameters as Windows XP, Windows Vista consumes 40 percent more CPU cycles per database transaction on our dual-core test bed and 44 percent more on our quad-core test bed. Similarly, Vista chews up 30 percent more cycles when executing our workflow transaction loop on dual-core and 27 percent more cycles on quad-core.
It should come as no surprise that Windows 7 performs very much like its predecessor. In fact, during extensive multiprocess benchmark testing, Windows 7 essentially mirrored Vista in almost every scenario. Database tasks? Roughly 118 percent slower than XP on dual-core (Vista was 92 percent slower) and 19 percent slower than XP on quad-core (identical to Vista). Workflow? A respectable 38 percent slower than XP on dual-core (Vista was 98 percent slower) and 59 percent slower on quad-core (Vista was 66 percent slower).
Source: http://www.infoworld.com/t/platforms/generation-gap-windows-multicore-273?page=0,2&source=rs
There are two key takeaways from the above data points. First, the workloads still run much slower on Vista than on XP. This is true for both dual- and quad-core systems. Second, Vista scales better than XP when moving from two to four CPU cores. This is demonstrated by the way that Vista closes the performance gap with XP as you increase the core count. Taken to its logical conclusion -- and disregarding for the moment external factors, like bus speeds, I/O contention, and memory latency -- Vista would ultimately overtake XP when the core count reaches between 32 and 64.
For example, when viewed under the same processor-utilization parameters as Windows XP, Windows Vista consumes 40 percent more CPU cycles per database transaction on our dual-core test bed and 44 percent more on our quad-core test bed. Similarly, Vista chews up 30 percent more cycles when executing our workflow transaction loop on dual-core and 27 percent more cycles on quad-core.
It should come as no surprise that Windows 7 performs very much like its predecessor. In fact, during extensive multiprocess benchmark testing, Windows 7 essentially mirrored Vista in almost every scenario. Database tasks? Roughly 118 percent slower than XP on dual-core (Vista was 92 percent slower) and 19 percent slower than XP on quad-core (identical to Vista). Workflow? A respectable 38 percent slower than XP on dual-core (Vista was 98 percent slower) and 59 percent slower on quad-core (Vista was 66 percent slower).
Source: http://www.infoworld.com/t/platforms/generation-gap-windows-multicore-273?page=0,2&source=rs
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