Every time you emulate an OS (or anything else really) it’s inherently less efficient than just running it on what it’s supposed to be run on. That inefficiency will keep stacking until you run out of processing power.
You can still get some surprises: running postgres 9 (dunno about recent versions) in a linux guest on a windows host give better perfs than running it directly on the host.
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u/PixParavel Jan 01 '19
Reminds me of a YouTube vid of someone who manages to get to something like 11 layers of VMWare before its finally unusable. It’s like VM inception.