The answer is that it doesn’t have to be like that. In practice virtual machines are trying to emulate a lot of stuff that isn’t really needed but they’re doin

The answer is that it doesn’t have to be like that. In practice virtual machines are trying to emulate a lot of stuff that isn’t really needed but they’re doing it for compatibility. If one builds a hypervisor which is optimized for startup speed and doesn’t need to support generalized legacy software then you can: > Unlike traditional VMs that might take several seconds to start, Firecracker VMs can boot up in as little as 125ms.