[Durable Objects] Add best practices guide for using Dynamic Workers with storage #27638
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thomsoncf
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Oxyjun,
elithrar,
joshthoward,
lambrospetrou,
mikenomitch and
vy-ton
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danlapid
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Jan 14, 2026
| # Durable Object | ||
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| class WebSocketHibernationServer(DurableObject): | ||
| def __init__(self, state, env): |
Contributor
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Formatting changes here seem wrong
danlapid
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Jan 14, 2026
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Are any of the changes here intentional?
danlapid
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Jan 14, 2026
| pcx_content_type: navigation | ||
| sidebar: | ||
| order: 4 | ||
| order: 5 |
danlapid
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Jan 14, 2026
| title: Error handling | ||
| pcx_content_type: concept | ||
| sidebar: | ||
| order: 6 |
danlapid
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Jan 14, 2026
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| A common example is a collaborative canvas application where user-submitted code processes AI responses in chunks, storing each chunk and broadcasting changes to multiple clients in real-time. | ||
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| ## Understanding subrequest limits |
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I would actually drop this entire section.
- This limit is being changed to be customer configurable by end of week.
- This is actually not the key point at all, see my latest reply on the slack chat that triggered this.
danlapid
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Jan 14, 2026
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| ### Why this matters with dynamic workers | ||
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| If your dynamic worker makes multiple RPC calls per operation (for example, one to save data, one to broadcast changes), and processes many operations (for example, 50+ chunks from a streaming API), you can quickly exceed subrequest limits: |
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Yeah again, this is not about the subrequests limit
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Adds comprehensive documentation for using Dynamic Worker Loaders with Durable Objects storage. This best practices guide addresses a common architectural challenge where developers executing untrusted user code within dynamic workers need efficient access to Durable Object storage without hitting subrequest limits.
New documentation:
/src/content/docs/durable-objects/best-practices/dynamic-workers-with-storage.mdx- Complete best practices guide with working code examples/src/content/changelog/durable-objects/2026-01-14-dynamic-workers-storage-guide.mdx- Changelog entry announcing the new guideKey content includes:
RpcTargetto pass storage references directly to dynamic workers running inside Durable ObjectsRpcTargetvsWorkerEntrypointFiles modified:
dynamic-workers-with-storage.mdx(sidebar order: 4)2026-01-14-dynamic-workers-storage-guide.mdx(changelog)best-practices/index.mdx- sidebar order 4 → 5best-practices/websockets.mdx- sidebar order 5 → 6best-practices/error-handling.mdx- sidebar order 6 → 7This documentation is based on production troubleshooting and technical guidance from the Workers platform team.