[libvirt-users] performance tradeoffs/penalty

[lejeczek]

hi everybody

a newbie here, hoping some experienced users/expert can 
honestly answer this one question,
and I think I realize all other advantages libvirtoffer but 
simply performance,

does libvirt make a user pay penalty, even if only a small 
amount, for using it when compared to raw qemu-kvm command line?
if it does where the overhead goes? quest or host, or maybe 
both?
lastly
if overall performance is slower then how small it is 
comparing to all the advantages it offers?

many thanks
and apologies if this subject was answered already in the past

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