Using User Timing API in Nodejs via perf_hooks package

perf-node.js

const { performance, PerformanceObserver } = require('perf_hooks');

const marker = 'my-marker';

const observer = new PerformanceObserver((list) => {
  // Using `console.log()` to display metrics for `my-marker`
  // After that, this observer will be disconnected
  console.log(list.getEntries().find(i => i.name === marker));
  observer.disconnect();
});

observer.observe({ entryTypes: ['measure'] });

// Starting the marker
performance.mark(marker);

setTimeout(() => {
   
  // Calling the marker for comparison
  performance.mark(`${marker}-end`);
  setTimeout(() => {
    performance.measure(marker, marker, `${marker}-end`);
  }, 1000);
}, 2000);