Why it matters

Dynamo is graph capture layer. Understanding shapes compiler stack.

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The architecture

Hooks Python interpreter.

Traces to FX graph.

Falls back for unsupported.

Dynamo capturePython executionuser codeDynamo hookbytecode analysisFX graphfor backendPreserves Python semantics; graph breaks on unsupported ops; backend agnostic
Dynamo.
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How it works end to end

Frame evaluation hook.

Guards: check assumptions still valid.

Recompile on guard fail.

Graph break: fall to eager, resume compile.