I run windows in VirtualBox on my Ubuntu machine and it runs perfectly, so I don't know why Ubuntu would be running slowly, especially given that it should be less resource intensive.
Have you tried playing around with the settings? Give it some more ram, some more video memory, maybe dick around with the chipset setting, etc, etc?
If you just want to play around, I've found that running ubuntu live from a USB3 flash drive was surprisingly ok.
I run windows in VirtualBox on my Ubuntu machine and it runs perfectly, so I don't know why Ubuntu would be running slowly, especially given that it should be less resource intensive.
Have you tried playing around with the settings? Give it some more ram, some more video memory, maybe dick around with the chipset setting, etc, etc?
If you just want to play around, I've found that running ubuntu live from a USB3 flash drive was surprisingly ok.