I decided recently that since I virtualize all my programming environments there is basically no reason for me to be running Windows as a host OS. So, to get me started I installed Ubuntu via wubi and am happily dual-booting to it. From inside I can use virtualbox to access my windows 7 VM and start it up to develop in.
It's not particularly slower, but not any faster than it is on the Windows host and I wonder if that is because that's as fast as it's ever going to be on my hardware or because wubi still runs on top of windows.
Basically, I'm unclear on how exactly wubi works and what if any performance hits using it entails.