How many cpu (cores) are there in you server? Remember VMware is not a Ferrari; it's a bus, making it possible to bring multiple VMs to the target in time.
Lars: 1 CPU in the server
Basically what I am wondering is that if I compile four processes in four different VM's it takes approximately fourty minutes for each process. However, if I do just one process on one VM it takes fourty minutes aswell. Why does it take the same time?
A compile job is rarely a 100% cpu job. If 4 VMs get's their stuff compiled simultaneously I would guess that each of them wont take more than 20-25% cpu time when compiling, even when a single compile is running alone.
There are url=http://vmktree.org/tools[/url] available where you can monitor this.