PerformanceObserver: takeRecords() method

takeRecords()

const observer = new PerformanceObserver((list, obj) => {
  list.getEntries().forEach((entry) => {
    // Process "mark" and "measure" events
  });
});
observer.observe({ entryTypes: ["mark", "measure"] });
const records = observer.takeRecords();
console.log(records[0].name);
console.log(records[0].startTime);
console.log(records[0].duration);