monitor Node.js event-loop delays (requires Node.js v11+)

monitor-event-loop-delays.js

// Source: https://twitter.com/jasnell/status/1233135311959445504
//
// PSA: Did you know that since Node.js 11.0.0 there's been a built-in mechanism for monitoring event loop delay?


const { monitorEventLoopDelay } = require('perf_hooks');

const h = monitorEventLoopDelay({ resolution: 20 });

h.enable();

// Do something.

h.disable();