From Guesswork to Data: Mastering Node.js Performance Diagnosis in Production

Production Node.js slowdowns cannot be fixed by intuition alone—they require systematic profiling with real data. This guide equips developers with essential tools (V8 flame graphs, clinic.js, heap snapshots) to diagnose CPU bottlenecks, memory leaks, and event loop blockage in live environments. Mastering these techniques transforms reactive debugging into proactive optimization.