Recent versions of Parallels Desktop For Mac, the configuration has included a checkbox for “Enable Adaptive Hypervisor”.
Configure
> Options
> Optimization
> Performance
> Enable Adaptive Hypervisor
Why is this not turned on by default? What is the downside?
Does this make use of hardware features, such as by Intel in the CPU?
The online help is vague:
To set Parallels Desktop to automatically optimize performance for Mac OS X or Windows depending on which application or program you're working with at the moment:
Select Enable Adaptive Hypervisor. When you're using a Windows program, more resources are given to Windows, and when you're using a Mac OS X application, more resources are given to Mac OS X.
So does this feature mean anything more than just “relinquish the CPU while in the background”? If that is all it means, then why not enable this by default? The product seems aimed at regular desktop users who just need to use a Windows app, so it would seem like this feature should be on by default. The fact that it is not the default makes me wonder if there is a downside or risk.