Hyperdaptive visor, what's this do?

Hi, I've searched for a little bit, and I'm wondering what the Hyperdaptive or Hyper Adaptive visor does (can't remember which).

Kind Regards
MythicFrost

 

You can check what does the "Adaptive Hypervisor" option do in the following article:
http://download.parallels.com/desktop/v4/docs/en/Parallels_Desktop_Users_Guide/26699.htm

 

Thank you

Kind Regards
MythicFrost

 

What I'm wondering is, why is Hypervisor disabled by default? Under what circumstances do we not want to use it?