How Dead Code Elimination boosts performance in NextJS

The "use no memo" directive is logically required. Let's say one is working with a compiler and facing an issue that requires disabling memoization to debug. Now, the best option is to use this directive to disable memoization for that component. As it takes priority over all settings, the React compiler will skip those functions. Internally, the React compiler optimizes the code at build time, allowing any relevant bugs to be caught and addressed at that time. But, before using it, you need to be working with the React compiler. How you tried that yet? link to docs attached in comment. #react #javascript #frontend

As developers most of us have relied heavily on useCallback and useMemo to avoid unnecessary re-renders. But with automatic memoization now built into the compiler in Nextjs 16… it now leaves us with a question, When do these hooks still matter? When do they actually become unnecessary? so i wrote a clear, practical breakdown for developers who want to stay ahead of the curve. Read the full article here: https://lnkd.in/dEtfRMup #Nextjs #ReactJS #FrontendEngineering #WebPerformance #SoftwareEngineering #TechInsights #JavaScript #ModernWeb

🧠 “use no memo”, when you tell React: don’t be too smart 😅 React 19’s compiler loves to optimize your code… sometimes too much. But what if you want to debug a component without React’s help ? That’s when you drop the magic line: "use no memo"; It tells React: “Relax buddy, let me handle this one myself.” 👩💻 This directive disables memoization for that function or component, super handy when testing or tracking weird re-renders. 👉 You’ll almost never need it, except in a few rare cases. But the fact that it exists says a lot about how much React now handles optimization under the hood. ⚙️ #react #javascript #typescript #frontend #reactcompiler #webdev

Trapped in a nested loop? Thinking you need a messy boolean flag to break out? Please. JavaScript has labels. `myLoop: for (...) { for (...) { if (found) break myLoop; } }` One line cleanly exits both loops. No flags. But it looks suspiciously like a `goto`, the most hated command in programming. Is this an elegant escape hatch, or a cryptic landmine for future developers? #GaboTips #JS

Ever felt lost in the complexities of the Node.js EVENT LOOP? 🤔 Let's demystify this core concept for better JavaScript performance! The Node.js Event Loop (powered by V8 and libUV) is the HEARTBEAT ❤️ of asynchronous JavaScript. Understanding it is CRUCIAL for writing efficient Node.js applications. Here are three key takeaways: 💡 Grasp the difference between BLOCKING and NON-BLOCKING I/O. Blocking I/O halts the entire process, non-blocking doesn't. ⏱️ Understand the nuances of `setImmediate` vs. `setTimeout(0)`. While seemingly similar, they behave differently in the event loop's execution order. `setImmediate` prioritizes I/O cycle, while `setTimeout(0)` goes to the timer queue. 🧵 Optimize your UV_THREADPOOL_SIZE. This determines the number of threads available for asynchronous operations. Increasing it can boost performance for CPU-intensive tasks. What's YOUR favorite Node.js performance tip? Share in the comments! 👇 #Nodejs #JavaScript #EventLoop #Asynchronous #Programming #Backend #Performance

🚀 Go + WASM: A real-time dashboard built in a few hours… with almost no JavaScript No Vue. No React. Under 60 lines of JavaScript. The challenge Build a production-quality dashboard without adopting yet another JavaScript framework that needs its own framework… and a framework for that framework’s build tool. The result ✅ Real-time health checks ✅ Instant search + sorting ✅ Smooth auto-refresh ✅ Minimal JavaScript (just the WASM loader) ✅ Everything else in Go, compiled to WebAssembly Just Go everywhere, from server to browser. Next challenge Scale this same design to 100,000 hosts. Curious about Go + WASM? DM me. #golang #webassembly #webdev #typescript #javascript #programming

⚙️ Day 40 | Variable Scope & Temporal Dead Zone Explored the fundamentals of scope in JavaScript — from global to block level — and how TDZ prevents early access errors. ✨ Key Learning: Scope = boundaries of logic. TDZ = guardrails for cleaner execution. 🔗 GitHub: https://lnkd.in/dtdU9-zZ #JavaScript #WebDevelopment #Frontend #LearningJourney

Just built a small fun project using JavaScript , a Random Joke Generator 😄 It fetches jokes dynamically from an external API (icanhazdadjoke.com) and displays the character count for each joke. This project helped me practice: Using async/await for API calls Working with JSON responses Updating DOM elements dynamically Check it out on GitHub 👇 https://lnkd.in/gNvRD_BB #JavaScript #WebDevelopment #Frontend #APIs #CodingPractice #AsyncAwait #LearningByBuilding #DeveloperJourney

⚙️ Ever wondered how JavaScript actually executes your code behind the scenes? 🤔 It’s not magic — it’s how the engine works! 🚀 👉 The JavaScript Engine (like V8) runs your code in two main phases: 1️⃣ Memory Creation Phase – Variables and functions get allocated in memory. 2️⃣ Execution Phase – Code runs line by line inside the Call Stack. 🧠 When asynchronous tasks (like setTimeout, API calls, or Promises) come in — they move to the Web APIs, then to the Callback Queue / Microtask Queue, and finally back to the Call Stack through the Event Loop. That’s the secret sauce of how JavaScript handles concurrency and non-blocking execution so smoothly! 💫 #JavaScript #WebDevelopment #MERNStack #CodingJourney #EventLoop #AsyncJS #V8Engine #Developers #TechCommunity #NamasteJavaScript

💡 JavaScript Tip: Choose Immutability! Working with arrays and objects in JS? Using immutable patterns makes your code safer, more predictable, and React-friendly. Here’s a complete cheat sheet: ✨ Why immutability matters: Prevents unexpected side-effects Easier debugging & testing Supports React reconciliation – React relies on object/array references to detect changes efficiently. Immutable updates make re-renders predictable and fast. #JavaScript #WebDevelopment #ReactJS #CodingTips #CleanCode #Frontend #ReactReconciliation