Marcus Vance

VERIFIED WRITER

@marcusvance · Principal Frontend Architect

Obsessed with React 19 compiler internals, browser rendering engines, and microfrontends.

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19 Published Essays

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Published by Marcus Vance

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Frontend7 min read

Under the Hood with the React 19 Compiler: What Actually Happens to Your Hooks

No more useMemo or useCallback boilerplate. But how does React Compiler infer dependency graphs at compile time? We inspect the generated intermediate representation.

Marcus Vance

Aug 29, 2026