[quote=CONCHO]Dude you really need to try VMWare Fusion on OS X, you will be amazed at how fast it goes. Not 100% as fast as native but very close, I would guess 90%. The instructions are all native since it’s Intel. The time saved not having to reboot the host will more than make up the difference.

Also you shouldn’t have to build the whole Android system that often. It does take forever to build though.[/quote]

I rebuild every version of android system probably 4-5 times a day.

I am running virtualization using VirtualBox, but performance pails in comparison to native. So ubuntu has to be native.