← Thursday, October 1, 2026ArchitectureCase study
Cloudflare rebuilds Containers for agent sandboxes, cutting median startup to 648 ms
The redesign adds runtime-selected images and instance types, snapshots, and a new scheduling policy; an independent benchmark reports median startup falling from just over four seconds to 648 ms. The architecture and measured startup gains are useful for engineers building on-demand agent execution environments.
- What
- Cloudflare reworked Containers for agent sandboxes, adding runtime choice of image and instance type, faster startup, and filesystem snapshots.
- How
- A new scheduling policy gives application code control over each sandbox; an independent benchmark measured median startup falling from just over four seconds to 648 milliseconds.
- Why it matters
- On-demand sandbox control and snapshots support agent tasks that need a fast Linux workspace and may pause and resume later.
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