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# Suspense Primitives behind PythonNative's async rendering model: the [`Suspend`][pythonnative.suspense.Suspend] signal, the standard asyncio tasks that run `async def` component bodies, cached async values ([`Resource`][pythonnative.Resource] / [`start_resource`][pythonnative.start_resource]), and code splitting with [`lazy`][pythonnative.lazy]. The user-facing pieces are the [`Suspense`][pythonnative.Suspense] boundary component (documented with the other [components](components.md)) and the [`use_resource`][pythonnative.use_resource] hook (documented with the other [hooks](hooks.md)); this page covers the underlying machinery. ::: pythonnative.suspense options: show_root_heading: false show_root_toc_entry: false members_order: source filters: ["!^_"] ## Next steps - Walk through async components, `Suspense`, and `use_resource` end-to-end: [Async + data guide](../guides/async.md). - See how suspension threads through the render pass: [Architecture](../concepts/architecture.md).