I have two VMs configured identically (hardware wise), the only difference is that the Windows XP one is uber fast and the Xubuntu very slow. I know this is an open ended question, but would anyone have any hunches on why?
closed as not a real question by Takkat, John S Gruber, con-f-use, htorque, izx Aug 21 '12 at 20:31
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If it's a fresh install of XP (without updates, antivirus and everything else you need) then it will seem very fast compared with Xubuntu.
The minimum & recommended RAM for Xubuntu are 256mb & 512mb, which is 4 time more than XP.
Lubuntu would provide similar performance to XP.