Is there a way to speed up a Virtual Box VM?
Mia Lopez 
I run Windows 7 in a virtual box on a Mac OS X (MacBook Pro) - but the virtual machine is pretty slow. I really hope there's a way to speed it up somehow - like reallocating memory or something? - because I plan to use Xilinx on it (it's the only reason I set up virtual box).
If it remains this slow... then it might be better to set up dual boot or a partitioned drive or something, but I originally decided against that because then I'd have to restart my computer every time I wanted to switch.
12 Answers
First: Check that the Guest Additions are installed properly.
After that, you can try:
- Increasing memory.
- Using hardware virtualization if your hardware supports it (in the settings of the virtual machine, choose "Enable VT-x/AMD-V").
- Disabling eye-candy (Aero etc...) and unneeded services in the guest operating system.
From my experience, this is what I need to do in most my VMs to get an acceptable speed.
2Virtual machines are always slower than a host operating system. Basically your computer resources will be used by two operating systems at the same time so there's always a big performance penalty (even if you don't notice it, the computer will).
At first, you should know how much memory you can spare for Windows. For example if you have 4 GB of RAM, for Windows 7, 2 GB would be acceptable.
In my case, I have 8 GB and I run Windows 7 with 4 GB and it runs well. Although it runs much much better natively.
Also, a great idea would be storing the Virtual Machine's files on an external hard disk. It may seem awkward but it helps a lot in my case, that I have FileVault enabled! :)
Oh, by the way, have you installed Guest Additions? It helps your virtual machine to run much much smoothly (Check Devices->Install Guest Additions...).
Good luck :-)
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