This article was originally published on AI Study Room . For the full version with working code examples and related articles, visit the original post. Node.js Performance Optimization Guide Node.js Performance Optimization Guide Node.js Performance Optimization Guide Node.js Performance Optimization Guide Node.js Performance Optimization Guide Node.js Performance Optimization Guide Node.js powers high-throughput web applications, but performance requires understanding its single-threaded event loop and non-blocking I/O model. Event Loop Fundamentals The event loop processes callbacks in phases: timers, I/O callbacks, idle/prepare, poll, check (setImmediate), and close callbacks. Each phase has a FIFO queue of callbacks. Blocking any phase delays all subsequent callbacks. Avoid blocking the event loop. CPU-intensive operations (JSON parsing, cryptography, template rendering) block all other requests. Offload CPU work to Worker Threads, child processes, or dedicated microservices.…