The major reason for the initial excitement about containers was the relative efficiency as compared to VMs. I understand that Firecracker has a low memory overhead and a fast startup time but I'd be interested to know what the virtualization overhead is in terms of cpu performance. I poked around on google a bit for a few minutes but didn't find anything.
My understanding is that it's just KVM under the hood, so cpu perf should match KVM. Firecracker is mostly just optimizing startup time and memory overhead.
