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Re:Firecracker – Lightweight Virtualization for Serverless C... by nine_k on Tuesday November 27, 2018 @10:52AM (#18543299)
Your container = your environment.

When your container is not running (say, 99% of time), other customers' containers are running. No need to ever boot the kernel, etc.

One might say that an unikernel has advantages over it. But it also has a higher barrier to entry.

Re:Firecracker – Lightweight Virtualization for Serverless C... by Twirrim on Tuesday November 27, 2018 @11:33AM (#18543752)
It's a KVM microinstance. Your image = your environment. Same as with a container.