A couple of days ago Adrian Kingsley-Hughes from ZDNet published some information about the performance of Windows 7 Beta 1 (build 6.1.7000.0.081212-1400), these early builds are more geared towards stability than performance, but it still pretty interesting to get an early preview of the performance of Windows 7. You can check it out over here.
The reporter performed a total of 23 tests and compared the beta of Windows 7 against Windows Vista SP1 and Windows XP SP3 on an AMD and Intel based test system. Adrian reports Windows 7 Beta came out as the fastest operating system in almost all of its tests, but unfortunately he can't share any specifics as the Windows 7 Beta EULA forbids you to publish benchmarks.
The bottom line is that the more I use Windows 7 the more I like it. Sure, we’re looking at a beta build here and not the final code, so things could change between now and release (although realistically final code ends up being faster than beta code). Also I still have some nagging issues relating to the interface, and some concerns that the UAC changes will break applications and other code, especially installers, but overall Windows 7 beta 1 is a robust, solid bit of code.