Server Serialization

## Minimize Serialization at RSC Boundaries The React Server/Client boundary serializes all object properties. Only pass fields that the client actually uses. **Incorrect (serializes all 50 fields):** ```tsx async function Page() { const user = await fetchUser() // 50 fields return } 'use client' function Profile({ user }: { user: User }) { return // uses 1 field } ``` **Correct (serializes only 1 field):** ```tsx async function Page() { const user = await fetchUser() return } 'use client' function Profile({ name }: { name: string }) { return } ```