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.