Today Canonical released a benchmark pitting LXD against KVM promising vast improvements in performance.
On average, LXD guests started in 1.5 seconds, while KVM guests took 25 seconds to start.
I understand somewhat the reasoning: “LXD brings some of the advantages of virtualisation to LXC so we should compare it to KVM”. But still this comparison is very silly and quite unfair. KVM starts a full guest OS while LXD launches a containerized environment. I wonder why they didn’t benchmark against Docker? Also nothing was said about the security advantages one gets by a separate kernel namespace in KVM vs containers 😉
The point one should probably take away from this is: Use the right tool for the job!
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