ismail khan’s Post

🚀 90% of React Native apps feel slow… And it's NOT React Native's fault. Let's be honest 👇 ⚡ React Native is fast 🐢 Poor implementation makes it slow After working on real-world apps, here's what actually matters: 🚫 Unnecessary re-renders ✅ Use React.memo, useCallback, useMemo 🚫 Poor state management ✅ Use Redux Toolkit / Zustand effectively 🚫 Heavy screens ✅ Break UI into small, reusable components 🚫 Unoptimized lists ✅ Optimize FlatList (keyExtractor, getItemLayout) 🚫 Large images ✅ Compress + lazy load images 🚫 Blocking JS thread ✅ Avoid heavy synchronous tasks 🚫 Too many API calls ✅ Debounce + cache responses 🚫 Bad animations ✅ Use Reanimated / native driver 🔥 Performance Checklist: ⚙️ Enable Hermes ⚡ Prefer MMKV over AsyncStorage 📊 Use FlashList for large datasets 📦 Keep bundle size small 🧹 Remove unused libraries 🔍 Profile with Flipper & DevTools 🧪 Always test in production mode 💡 Final Truth: Good code → ⚡ Smooth app Bad code → 🐢 Laggy app 👀 Users don't care how you built it… They only care how it feels. 💬 What's your go-to trick to improve React Native performance? #ReactNative #MobileDevelopment #AppPerformance #PerformanceOptimization #JavaScript #TypeScript #SoftwareEngineering #CleanCode #Developers #Redux #Zustand #AndroidDevelopment #iOSDevelopment #CrossPlatform

🚀 90% of React Native apps feel slow… And it's NOT React Native's fault. Let's be honest 👇 ⚡ React Native is fast 🐢 Poor implementation makes it slow After working on real-world apps, here's what actually matters: 🚫 Unnecessary re-renders ✅ Use React.memo, useCallback, useMemo 🚫 Poor state management ✅ Use Redux Toolkit / Zustand effectively 🚫 Heavy screens ✅ Break UI into small, reusable components 🚫 Unoptimized lists ✅ Optimize FlatList (keyExtractor, getItemLayout) 🚫 Large images ✅ Compress + lazy load images 🚫 Blocking JS thread ✅ Avoid heavy synchronous tasks 🚫 Too many API calls ✅ Debounce + cache responses 🚫 Bad animations ✅ Use Reanimated / native driver 🔥 Performance Checklist: ⚙️ Enable Hermes ⚡ Prefer MMKV over AsyncStorage 📊 Use FlashList for large datasets 📦 Keep bundle size small 🧹 Remove unused libraries 🔍 Profile with Flipper & DevTools 🧪 Always test in production mode 💡 Final Truth: Good code → ⚡ Smooth app Bad code → 🐢 Laggy app 👀 Users don't care how you built it… They only care how it feels. 💬 What's your go-to trick to improve React Native performance? #ReactNative #MobileDevelopment #AppPerformance #PerformanceOptimization #SuperAppArchitecture #JavaScript #TypeScript #SoftwareEngineering #CleanCode #Developers #Redux #Zustand #AndroidDevelopment #iOSDevelopment #CrossPlatform

Reusing React.js code inside a React Native app using WebView 👇 It’s a common approach teams explore when trying to move faster. The idea sounds simple: “Why rebuild in React Native when we already have it in React (Web)?” So we embed the web app inside a WebView. And yes — it works. But the real story starts after that. What you gain: • Faster initial delivery   • Code reuse from web   • Reduced duplicate effort  What you quickly realize: • Performance depends on WebView rendering   • Native feel can be limited   • Communication between app ↔ web becomes complex   • Debugging spans two layers (native + web)   • Offline & device features need extra handling  In production, this becomes a trade-off: Speed vs Experience Senior lesson: WebView is not a shortcut. It’s an architectural decision. Use it when: → You need fast iteration   → Content is web-heavy   → Native interaction is minimal  Avoid it when: → You need high performance   → Deep native integrations   → Complex animations / gestures  React Native and React.js may look similar. But they solve different problems. Choosing how to combine them is where engineering judgment matters. Have you used WebView in production apps?   What challenges did you face? 👇 #ReactNative #ReactJS #MobileDevelopment  #SoftwareArchitecture #HybridApps #TechLeadership

If your React Native app feels slow, it’s probably not React Native. Let’s be honest. React Native is already capable of delivering solid performance. Most of the time, the real issue isn’t the framework — it’s how we build on top of it. After working on production apps, one thing becomes very clear: Performance problems are rarely technical limitations. They are usually the result of decisions. For example: When everything re-renders constantly, the problem is not React Native. It’s about missing optimizations like React. memo, useCallback, and useMemo. When state management feels chaotic, it’s often because there’s no clear structure. Tools like Redux Toolkit or Zustand can bring much-needed clarity. When a single screen tries to handle too much, performance suffers. Breaking it into smaller, focused components makes a huge difference. FlatList is often blamed for being slow, but in reality, it performs well when configured properly with keyExtractor and getItemLayout. Images are another overlooked area. Unoptimized images can quietly hurt performance. Compression, optimization, and lazy loading are essential. The JavaScript thread is not unlimited. Blocking it with heavy work leads to visible lag. Repeated API calls without control can slow things down. Debouncing and caching are simple fixes that go a long way. And animations are not just visual polish. They directly impact how fast your app feels. Using Reanimated or native drivers improves perceived performance significantly. Here are a few practices that consistently help in real-world apps: Turn on Hermes Use MMKV instead of AsyncStorage Use FlashList for large datasets Keep your bundle size small Remove unused dependencies Profile with Flipper instead of guessing Always test in production mode The uncomfortable truth is this: A slow app is often just the result of unclear thinking expressed in code. Users don’t care about your architecture or the libraries you chose. They care about one thing — does the app feel instant? What’s one performance mistake you made that taught you something valuable? #ReactNative #MobileAppDevelopment #AppPerformance #SoftwareDevelopment #ProgrammingTips #CleanCode #FrontendDevelopment #MobileDevelopment #TechLeadership #AppOptimization #JavaScript #DeveloperTips #CodingBestPractices #PerformanceMatters #BuildInPublic

Advanced React Native performance tricks used in production apps: Most React Native performance advice stays at the beginner level. But in real production apps, the biggest wins usually come from these: - Tuning FlatList properly - Keeping list items lightweight - Moving animations to the UI thread with Reanimated - Using the New Architecture for better responsiveness - Shifting expensive work into native modules when needed - Deferring non-critical tasks at app startup - Reducing unnecessary re-renders from unstable props and callbacks - Profiling first instead of guessing One lesson I keep seeing: Performance problems usually come from architecture decisions, not just one slow component. What advanced optimization has helped you the most in React Native? #ReactNative #MobileDevelopment #Performance #JavaScript #AppDevelopment #SoftwareEngineering

Why React Native Doesn’t Have Big Major Versions I recently stumbled upon something quite intriguing: React Native doesn’t really have those “big hype” major versions like many other frameworks do. There aren’t any massive v2, v3, or v10 moments. And the more I ponder it, the more it actually makes sense. 1. 𝘐𝘵 𝘢𝘤𝘵𝘶𝘢𝘭𝘭𝘺 𝘬𝘪𝘤𝘬𝘦𝘥 𝘰𝘧𝘧 𝘢𝘴 0.𝘹 𝘰𝘯 𝘱𝘶𝘳𝘱𝘰𝘴𝘦 React Native spent quite a while in the 0.x versions. In 𝐬𝐞𝐦𝐚𝐧𝐭𝐢𝐜 𝐯𝐞𝐫𝐬𝐢𝐨𝐧𝐢𝐧𝐠, 0.x essentially means: “API isn’t fully stable yet” So rather than pretending to have stability with a v1.0, the team chose to: - keep rolling out improvements - allow breaking changes when necessary - steer clear of setting false expectations 2. 𝘚𝘵𝘢𝘣𝘪𝘭𝘪𝘵𝘺 𝘪𝘴 𝘣𝘦𝘵𝘵𝘦𝘳 𝘵𝘩𝘢𝘯 𝘥𝘪𝘴𝘳𝘶𝘱𝘵𝘪𝘰𝘯 React Native evolves in small steps and instead of shaking everything up with major releases, it enhances things bit by bit. For mobile apps, this can be crucial: - apps can be in production for years - updates can be costly (think App Store / Google Play) - 𝐛𝐫𝐞𝐚𝐤𝐢𝐧𝐠 𝐜𝐡𝐚𝐧𝐠𝐞𝐬 can really impact users 3. 𝘛𝘩𝘦 𝘢𝘳𝘤𝘩𝘪𝘵𝘦𝘤𝘵𝘶𝘳𝘦 𝘥𝘪𝘥 𝘤𝘩𝘢𝘯𝘨𝘦 — 𝘫𝘶𝘴𝘵 𝘪𝘯 𝘢 𝘴𝘶𝘣𝘵𝘭𝘦 𝘸𝘢𝘺 Here are the list of potential breaking changes: - the New Architecture (Fabric, TurboModules) - better performance - enhanced native interop But they were introduced gradually rather than with a “React Native 2.0” splash. 4. 𝘔𝘰𝘣𝘪𝘭𝘦 𝘪𝘴𝘯’𝘵 𝘵𝘩𝘦 𝘴𝘢𝘮𝘦 𝘢𝘴 𝘞𝘦𝘣 On the web, you can redeploy in an instant. On mobile, every mistake can cost: - 𝐫𝐞𝐥𝐞𝐚𝐬𝐞 𝐜𝐲𝐜𝐥𝐞𝐬 - user trust - store approvals So, the ecosystem naturally leans towards evolution rather than revolution. 5. 𝘐𝘵’𝘴 𝘮𝘰𝘳𝘦 𝘢𝘣𝘰𝘶𝘵 𝘙𝘦𝘢𝘤𝘵 𝘪𝘵𝘴𝘦𝘭𝘧 React Native follows the lead of React: - hooks - concurrent features - rendering model The “big changes” occur in React, not in the version numbers of React Native. #ReactNative #React #MobileDevelopment #JavaScript #SoftwareEngineering #Frontend #AppDevelopment #Tech

Most React Native apps don't break. They slowly become harder to work with. I've seen this happen around the 4-6 month mark in a live product. At first, everything feels fast. Features ship quickly. The codebase is still clean. Then things change. 1. New features pile up 2. State logic grows 3. Quick fixes start stacking Suddenly: 1. One change affects multiple screens 2. Debugging takes longer than building 3. Developers hesitate before touching certain modules I used to think this was a React Native problem. It's not. It’s a growth problem. In one project, I dealt with this by refactoring while shipping: 1. Breaking tightly coupled modules step by step 2. Cleaning up Redux flows to reduce side effects 3. Standardizing patterns instead of adding new ones No rewrite. No big reset. Just consistent corrections. Over time, the codebase became usable again. Here’s the real lesson: Codebases don't become messy overnight. They decay quietly. And if you don't fix it early, you'll end up paying for it later. Have you experienced this in your projects? #softwareengineering #reactnative #refactoring

🚀 How React Native Works — And Why Optimization Matters Most developers use React Native… But very few truly understand how it works under the hood. At its core, React Native follows a simple flow: 👉 JavaScript Thread → Bridge → Native Components Sounds simple, right? But this is exactly where performance wins or breaks your app. 💡 Key Insight: Every interaction between JavaScript and Native goes through the Bridge — and it's asynchronous. That means: ⚠️ Too many calls = Performance bottlenecks ⚠️ Heavy logic in JS thread = UI lag ⚠️ Poor state management = Slow rendering --- 🔥 How to build optimized React Native apps: ✅ Minimize bridge communication ✅ Use FlatList instead of ScrollView for large data ✅ Avoid unnecessary re-renders (useMemo, useCallback) ✅ Optimize state management ✅ Move heavy work to native modules when needed --- 💭 Real learning: Building apps is easy. Building fast, scalable, optimized apps is what makes you a real developer. --- If you're preparing for real-world projects, 👉 Don’t just learn React Native… understand how it works internally. #ReactNative #MobileDevelopment #AppDevelopment #Performance #JavaScript #FullStack #SoftwareEngineering #Developers

One of the most impactful lessons I've learned building production React Native apps: Stop treating re-renders as an afterthought. Early on, it's easy to focus on shipping features. But at scale, uncontrolled re-renders quietly become your biggest performance bottleneck — laggy lists, unresponsive gestures, and stuttering animations that erode the user experience. Here's what made the biggest difference for us: → Memoize aggressively with React.memo, useMemo, and useCallback — but only where profiling shows it's needed. Premature optimization is still optimization. → Keep your state as local as possible. Global state shared across unrelated components is a silent re-render trap. → Use FlatList's keyExtractor and getItemLayout correctly. Skipping these is one of the most common causes of list performance issues in production. → Leverage the new React Native architecture (JSI + Fabric) wherever possible. The bridge is a bottleneck you no longer have to accept. Performance is a feature — and in mobile, users feel it before they can articulate it. What's the one React Native optimization that made the biggest difference in your projects? I'd love to hear. #ReactNative #MobileDevelopment #JavaScript #SoftwareEngineering #ProductEngineering

The React Native Guide – Complete Roadmap for Beginners & Developers! Just explored a powerful React Native Guide that clearly explains how to go from basics to building real mobile apps 📱 📌 What you’ll learn: • JavaScript fundamentals (ES6+, async/await, promises) • React basics (components, props, state, JSX) • Environment setup (Expo CLI / React Native CLI) • Core components (View, Text, Image, ScrollView, TextInput) • Styling (StyleSheet & Styled Components) • Navigation in mobile apps • Handling touch & gestures • Forms (Formik, React Hook Form) • State Management (Redux, MobX) • Debugging techniques • Animations & performance • Authentication & security • Testing (Jest, Detox) • Deployment & publishing 💡 Project Ideas included: • Food Delivery App • Chat App • E-commerce App • Social Media App • Crypto Tracker App • Learning App and more This guide is a complete roadmap to become a React Native developer. Follow : Mohit Kumar #ReactNative #MobileDevelopment #ReactJS #JavaScript #Developers #CodingJourney