http://www.howtogeek.com/95482/heres-why-windows-8-will-boot-much-faster-than-windows-7/
Here’s Why Windows 8 Will Boot Much Faster than Windows 7
What they came up with was a hybrid of cold booting and hibernate mode
On LapTop (it's kills Your Battery) on PC OK.
https://blogs.msdn.com/b/olivnie/archive/2012/12/14/windows-8-fast-boot.aspx
http://lifehacker.com/5841702/windows-8-speed-tests-its-faster-at-pretty-much-everything
Windows 8 seemed to win in every section except for the application starts, which it tied with Windows 7. Really, though, most of the scores were close enough that you wouldn't necessarily notice it in your day-to-day work, unless maybe you were on a low-powered machine, where the differences would be greater. Either way, it's nice to know that there definitely aren't any speed decreases in Windows 8.
http://news.cnet.com/8301-30685_3-20103787-264/microsoft-promises-faster-startup-for-windows-8/
Specifically, Windows 8 uses a hybrid technique intermediate between a full-on restart and the low-power hibernation state. In addition, Microsoft is speeding how fast a system will come out of hibernation by spreading the work across multiple processor cores.
"As in Windows 7, we close the user sessions, but instead of closing the kernel session, we hibernate it," Gabe Aul, a Windows program management director, said in a blog post yesterday. "It's faster because resuming the hibernated system session is comparatively less work than doing a full system initialization, but it's also faster because we added a new multi-phase resume capability, which is able to use all of the cores in a multi-core system in parallel."