The Firecracker MicroVMs behind Netlify Edge Functions start in about 2ms at p99. Once a function's JavaScript server starts listening, we snapshot the VM. Idle functions scale to zero, and the next invocation restores from that memory-mapped snapshot, so the VM starts executing before the whole snapshot is back in memory.
@UnikraftCloud built that lifecycle, and we worked closely with their team through the migration.
netlify.com/blog/edge-func…
@UnikraftCloud built that lifecycle, and we worked closely with their team through the migration.
netlify.com/blog/edge-func…
Oct 2, 2026 · 3:01 PM UTC
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@Netlify 2ms Firecracker cold start at p99 is the number. Snapshot-restore before the whole image is in memory is what I want to measure on a real edge function, not a hello world.
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