Detecting Event Loop Blocking in Production...

You're on call. Alerts fire. Your Node.js service is responding slowly — or not at all. You suspect event loop blocking, but the app is running in production. You can't redeploy with --inspect. You can't add require('blocked-at') to the source. You definitely can't restart it. What do you do? This is the problem that led me to build node-loop-detective — a diagnostic tool that attaches to a running Node.js process, detects event loop blocking and lag, and tells you exactly which function in whic