Rashedur Rahman

High-Resolution Performance Monitoring 📊 Microsecond precision (vs Date.now which is millisecond) 🎯 Same API as browser performance ⚡ Measure accurately without external libs #NodeJS #JavaScript #Performance #CodingTips #WebDev

📋 Built-in Diagnostic Reports · System info (OS, CPU, memory) · Node.js version & environment variables · Stack traces of all threads · Resource usage & libuv handles 🚨 No external modules needed 🎯 Perfect for production #NodeJS #JavaScript #Debugging #Production #DevTools

require.resolve.paths() - See Where Modules Are Found 📂 See exactly where Node.js looks for modules 🛠️ Debug module resolution issues 🧠 Understand require() behavior better #NodeJS #JavaScript #Debugging #Modules #WebDevelopment

🧵The vm Module - Run Code in Isolated Context 🔒 Run untrusted code safely 🧪 Test snippets without polluting global scope ⚙️ Create custom JavaScript interpreters #NodeJS #JavaScript #Security #Programming #DevTips

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util.callbackify() - Convert Async to Callback 🔄 Bridge async/await with callback code 🎯 Easy API compatibility ⚡ No manual wrapping needed #NodeJS #JavaScript #AsyncProgramming #LegacyCode #WebDevelopment

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🐌 Slow Event Loop Detection 🚨 Monitor event loop health 📊 Detect blocking operations 🎯 Identify performance bottlenecks Pro tip: Set up automated alerts when delay exceeds your threshold. Keep your Node.js app responsive! #NodeJS #JavaScript #Performance #Monitoring #Web

📁 __dirname & __filename in ES Modules 📌 Get file paths in ES Modules (not just CommonJS) 🔄 Works with import/export syntax 🎯 Essential for file operations #NodeJS #JavaScript #ESModules #WebDevelopment #CodingTips

🤝 cluster.schedulingPolicy - Load Balancing Control ⚖️ Customize worker scheduling 🎯 Optimize for your workload 📊 Better performance control Bonus: Set via env variable: NODE_CLUSTER_SCHED_POLICY='none' #NodeJS #JavaScript #LoadBalancing #Performance #Backend

🔧 util.types - Built-in Type Checking 🎯 Accurate type detection for built-ins 🚀 More reliable than typeof or instanceof 📦 40+ checks available #NodeJS #JavaScript #TypeChecking #WebDevelopment #CodingTips

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🎯 process.nextTick() Microtask Magic Execution Order: 1. Start 2. End 3. Next Tick 4. Immediate ⚡ Microtask queue priority 🔄 Control execution flow 🚫 Avoid recursion limits #NodeJS #JavaScript #AsyncProgramming #Performance #WebDevelopment

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📊 console.table() - Pretty Data Display ✨ Clean, readable object/array display 🎯 Perfect for API responses, datasets 📱 Works in terminal and browser consoles Bonus: Sort columns by clicking headers in browser console! #NodeJS #JavaScript #Debugging #WebDevelopment #Coding

📅 util.debuglog() - Conditional Debugging 🚀 Zero-cost debugging in production 🎯 Enable/disable per module 📊 Clean debug output with timestamps #NodeJS #JavaScript #Debugging #DeveloperTools #Programming

process.abort() vs process.exit() 💀 process.abort() = core dump + abort signal 🚪 process.exit() = clean shutdown 🎯 process.exitCode = set & exit later Key difference: abort() skips cleanup, creates core file for debugging. #NodeJS #JavaScript #Debugging #DevOps #Backend

📄 fs.readv() - Scatter/Gather File Reading 🎯 Efficient multi-buffer I/O ⚡ Single system call for multiple reads 📊 Perfect for fixed-format parsing Use case: Reading structured binary files, network packet processing etc #NodeJS #JavaScript #FileSystem #Performance #Backend

🔗 Worker Threads with SharedArrayBuffer 🧵 True parallel processing (not just async) 💾 Shared memory between threads ⚡ Avoid serialization overhead Use case: CPU-intensive tasks, scientific computing, etc. #NodeJS #JavaScript #Multithreading #Performance #WebDevelopment

🎭 util.promisify.custom - Custom Promise Wrappers ✨ Override default promisification 🛠️Better control over async APIs 🎯Clean integration with util.promisify #NodeJS #JavaScript #AsyncProgramming #CodingTips #WebDevelopment