Memoization and React.memo | Custom Comparator in React.memo | React Performance Optimization

Description

Are you confused about memoization in React or unsure when and why to use React.memo? Memoization is a core React interview topic, but many developers use React.memo without fully understanding how it works internally. In this video, we explain memoization and React.memo clearly, deeply, and from an interview + internals perspective. 📌 In this video, you’ll learn: ✅ What is memoization in React ✅ Why memoization is important for performance ✅ What is React.memo ✅ How React.memo works internally ✅ Shallow comparison & reference equality ✅ React.memo with custom comparison ✅ When to use React.memo (and when not to) ✅ Common mistakes developers make ✅ Interview‑ready explanations & one‑liners 📌 This is Episode 18 of the React Interview Preparation Series by Fullstack Diaries — focused on React fundamentals, internals, and performance optimization. 👨‍💻 Whether you’re a React beginner, frontend developer, or preparing for React interviews, this video will help you explain memoization confidently. 💬 Let’s Connect: 👍 Like the video 💬 Comment: Have you used React.memo in real projects? 🔔 Subscribe for weekly React & Frontend interview prep content 🧠 Keep learning & keep coding with Fullstack Diaries react memo memoization in react react memo explained what is react memo react performance optimization react interview questions react interview preparation react hooks interview frontend interview questions react js tutorial react js performance react shallow comparison react re rendering react optimization techniques react memo vs usememo react memo example react virtual dom #React #ReactMemo #Memoization #ReactJS #ReactInterview #ReactInterviewPreparation #FrontendDevelopment #FrontendInterview #JavaScript #WebDevelopment #ReactDeveloper #FrontendDeveloper #CodingInterviews #TechInterviews #PerformanceOptimization #ReactLearning #LearnReact #FullstackDiaries