Hi!
It all depends on how you define fast. Personally I use Hyper-V on my laptop for work. (Connected to multiple VPNs in different guests)
The best thing to do is to activate it and test it :) (There is no extra cost or need for another license)
Follow this link that will show you how to do it: http://blogs.technet.com/b/canitpro/archive/2014/03/11/step-by-step-enabling-hyper-v-for-use-on-windows-8-1.aspx
Best regards
Andreas Molin