title: Visual studio 2015 with update 3, source code ClearCase, running on Hyper-V, very slow
body: <p>I  have a problem with compilation time, on virtual machines running on Hyper-v, on windows server 2012 R2 STD. 
  the virtual machine is installed with windows 10.<br>
  the source code is Clearcase.<br>
  compilation time on the virtual machine is very slow (6 hours). 
  on physical PC (windows 10 and visual studio 2015 update 3) the compilation time is 2 hours.<br>
  what can be the problem? </p>