alt.hn

4/19/2026 at 11:22:39 PM

Show HN: Clone, a small Rust VMM, forks VMs in under 20ms via CoW

https://github.com/unixshells/clone

by rasengan

4/20/2026 at 3:32:59 AM

Thanks for sharing! I'm not sure your table under Why Clone is quite correct.

10x 512MB idle VMs should not take 5GB on Firecracker if they are started from snapshots since the 512MB memory file is mmap'ed with MAP_PRIVATE so is copy on write.

Firecracker has diff snapshots: https://github.com/firecracker-microvm/firecracker/blob/main...

by laurencerowe