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V8 SnapshotCreator pause: can heap serialization happen without stopping the isolate?

I'm evaluating V8's snapshot API ( v8::SnapshotCreator / SnapshotBlob ) as a way to migrate a small embedded JavaScript application from one process to another with no observable downtime. The plan is to serialize the isolate's heap, ship the blob to a new process, and resume execution there. From the documented behavior, snapshot creation appears to require

Backend pool management