context-rerenders-fix
Context Re-renders Fix
Diagnose and fix React Context re-renders through context splitting, memoization, or store extraction.
Why Context Causes Re-renders
Every component that calls useContext(MyContext) re-renders whenever the context value changes — even if the component only uses one field from a large object. This is the most common Context performance pitfall.
// ❌ Any change to user, theme, OR cart re-renders ALL consumers
const AppContext = createContext({ user, theme, cart, notifications });
Step 1: Diagnose
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