・The choice of state management can have a dramatic effect on React performance, but most comparisons focus on developer experience rather than runtime characteristics. Having implemented Context, Redux, Zustand and Jotai in production apps, the following factors were found to be important: re-render frequency, serialisation overhead and selector performance. Each solution balances these factors differently. Tool My Impression Trade-off Good Use Case Context API Simple but limited at scale Re-renders can spread easily Local or tightly related state Redux Structured and predictable More setup and concepts Large apps with strong debugging needs Zustand Lightweight and practical Less opinionated structure Modern apps that value simplicity Jotai Flexible and fine-grained Requires understanding atom-based thinking Derived and modular state Recoil Good for dependent state Heavier choice for some teams Complex state relationships MobX Powerful and reactive Different mental model Observable-style architecture A pitfall for Context API: mode) will cause all components consuming the context to re-render. import { createContext, useState } from 'react'; const UIContext = createContext(undefined); export function UIProvider({ children }) { const [theme, setTheme] = useState('dark'); const [account, setAccount] = useState(null); // Even a small change like "theme" will trigger re-render for all consumers const state = { theme, updateTheme: setTheme, account, updateAccount: setAccount, }; return ( {children} ); } Solution: Split contexts according to their update frequency: // Contexts split by how often they change const AccountContext = createContext(null); // Rare updates const AppearanceContext = createContext(null); // Medium updates const AlertContext = createContext(null); // Frequent updates // Each component subscribes only to the data it actually needs function Navbar() { const account = useContext(AccountContext); // Re-renders only when account changes return Hello, {account?.username}; } The Zustand approach offers better performance: import { create } from 'zustand'; // Components subscribe only to specific slices of state const useAppStore = create((set) => ({ account: null, colorMode: 'dark', messages: [], updateAccount: (account) => set({ account }), switchMode: (mode) => set({ colorMode: mode }), pushMessage: (msg) => set((prev) => ({ messages: [...prev.messages, msg], })), })); // This component reacts only to "colorMode" function ModeSwitcher() { const colorMode = useAppStore((s) => s.colorMode); const switchMode = useAppStore((s) => s.switchMode); return ( switchMode(colorMode === 'dark' ? 'light' : 'dark')}> Switch Mode ); }