How's the speed on the main computer? Are you using Solid State or Hard Disk storage? What were the specs of the VM's? 6X and 4X are big differences.

I was just outlining that with ideal conditions (fast processor Xeon E3/i7 with SSD), the performance seems to be the same. I plan to do further testing with hard drives. In the field, it's mainly the people with HDD's that are suffering significant performance issues. I was referring to our 2012 Solo+ server in the article which has some impressive specs even by today's standards. Bottom line was that if you had a similar processor and sufficient memory, try switching to SSD and the performance should be fine. I suspect the performance will degrade significantly when using hard disks as opposed to SSD's. The specs of the VM's aren't anything too crazy.