Optimise use of hardware under Mac + Windows in virtual machine I use a macbook pro with OS X El Capitan 10.11.4, 2,5 GHz Intel Core i7 and 8 GB 1333 MHz DDR3. 

I need to code in Visual Studio and use Microsoft Excel for Windows, thus I installed Parallels Desktop 11 for Mac Business Edition Vestion 11.2.0, installed Windows 10 and Visual Studio 2015. Here is the setting of Parallels Desktop:



So now i am working on the 2 operation systems, i feel the CPU is quite occupied; from time to time the fan has to work, the laptop surface is hot, and the whole systems do not feel very fast.

Does anyone have any idea to improve the situation? Is there a way to diagnostic which software is costly? Or do i have to buy another machine for coding under Windows?
Compiling takes CPU even if pure OSX so in a VM will take all the CPU. Fan working and hot is not an issue - it will happen (try compiling gcc under OSX on an i7 CPU all 8 threads will be running for several minutes) I would although give more memory to the VM

To see what is taking CPU you need to look at Activity Monitor in OSX (which will show Parallels taking up a lot of CPU) and Task Manager(I might have forgotten the correct name) in Windows to show what the VM is spending its time on