BUILDING A COMPUTER THAT CAN PAUSE AND RESUME IN MILLISECONDS: INSIDE THE MICROVM ARCHITECTURE BEHIND MANAGED AGENTS

Summary from the TLDR Dev newsletter

DigitalOcean's Firecracker platform separates agent sessions from their hosts using checkpointed disk, memory, and virtual-device state, with lazy loading to avoid downloading whole snapshots before resuming. Internal tests report under 200 milliseconds at p50 on the warm-template path, while external connections and API side effects remain outside the checkpoint.