Optimizing React Component Rendering Performance with Context API and Memoization
I've been struggling with this for a few days now and could really use some help... I've been banging my head against this for hours... I'm trying to debug I'm facing a significant performance issue in my React application that uses the Context API for state management..... As my application grows, I'm noticing that components consuming context are re-rendering too often. Even when the values in the context haven't changed, it appears that all components reliant on the context are re-rendering, resulting in a sluggish user experience. I've tried using `React.memo` to memoize my components, but I still see unnecessary renders, especially in deeply nested components. Here's a simplified version of my context provider and some of the consuming components: ```javascript import React, { createContext, useState, useMemo } from 'react'; const MyContext = createContext(); const MyProvider = ({ children }) => { const [state, setState] = useState({ value: 0 }); const value = useMemo(() => ({ state, increment: () => setState(prev => ({ value: prev.value + 1 })) }), [state]); return <MyContext.Provider value={value}>{children}</MyContext.Provider>; }; const ComponentA = () => { const { state } = React.useContext(MyContext); return <div>Value: {state.value}</div>; }; const ComponentB = React.memo(() => { const { increment } = React.useContext(MyContext); return <button onClick={increment}>Increment</button>; }); ``` Even though `ComponentB` is memoized, it seems to re-render every time the context updates. I've also considered using `useReducer` instead of `useState`, thinking it might help with performance, but I'm not sure how that would improve the situation. When I inspect the components with React DevTools, it shows that `ComponentA` re-renders every time I click the button in `ComponentB`, which I don't expect. I've also checked for any non-memoized props being passed down, but everything seems fine. Is there a more effective way to limit re-renders when using Context API, or should I rethink my state management approach altogether? Any insights or best practices for optimizing performance in this scenario would be greatly appreciated. Iām using React 17.0.2 and the latest version of React DevTools. For context: I'm using Javascript on macOS. I'm using Javascript LTS in this project. Has anyone dealt with something similar?