Zero-Downtime Event Loop Diagnostics: Debug Production Node.js Without Restarts

Event loop blocking is a critical performance issue in Node.js applications, but traditional diagnostic tools require code changes or restarts—making them impractical for production environments. node-loop-detective solves this by leveraging SIGUSR1 and V8 Inspector to attach to running processes without downtime or code modifications, enabling engineers to pinpoint bottlenecks under real production load.