Google Described Its Agent Sandbox, So I Built One with Firecracker and Measured It
attilathehoon · hn · 2026-11-08
After Google published a description of its Agent Sandbox design, the author set out to recreate it using Firecracker microVMs and benchmark the result.
- Motivation: Google only shared an architecture description without an implementation, so the author wanted to measure the real overhead of the microVM approach for agent code execution.
- Approach: Each agent task spins up a lightweight Firecracker microVM providing an isolated execution environment; startup latency and resource usage were measured.
- Value: Offers first-hand data and an engineering path for anyone building a self-hosted agent sandbox instead of relying on managed APIs.
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