Is Zustand better than React Context?

For high-frequency state updates, yes. Context re-renders every consumer when its value changes. Zustand only re-renders components that read the specific slice of state that changed. For low-frequency state (theme, locale), Context is simpler and the performance difference is negligible.

When should I use React Context?

Use Context for low-frequency state that many components need: current user, theme, locale, feature flags, current organization. Avoid Context for state that updates often (form input, real-time data, animations) — the re-render cost adds up fast.

Does Context cause performance issues in React?

Only when the Context value updates frequently or when too many components consume it. Each consumer re-renders when the value changes, even if they only use a small slice. This is why Context works for theme (changes rarely) and struggles for form state (changes on every keystroke).

What is the Zustand selector pattern?

Instead of reading the whole store, components read only the slice they need: const count = useStore(state => state.count). Zustand runs the selector and only re-renders the component when the returned value changes. Components that don't read count don't re-render when it updates.

Stop Using Context for Everything — When Zustand Wins in 2026

React Context is the default state tool for most teams. It ships with React, no extra library, easy to set up. It's also the slowest option for anything that updates often.

I see this pattern in every React codebase I audit: a giant AppContext holding auth, theme, cart, search filters, and form state. Every keystroke in the search input re-renders the whole app. The fix isn't more React.memo. The fix is using the right tool for each piece of state.

The actual cost of Context

Context's contract: when the value changes, every consumer re-renders. Period.

const AppContext = createContext(null)
 
function AppProvider({ children }) {
  const [searchQuery, setSearchQuery] = useState('')
  const [theme, setTheme] = useState('dark')
  const [user, setUser] = useState(null)
 
  return (
    <AppContext.Provider value={{ searchQuery, setSearchQuery, theme, setTheme, user, setUser }}>
      {children}
    </AppContext.Provider>
  )
}