PerformanceObserver.disconnect()

disconnect()

var observer = new PerformanceObserver(function (list, obj) {
  var entries = list.getEntries();
  for (var i = 0; i < entries.length; i++) {
    // Process "mark" and "frame" events
  }
});
observer.observe({ entryTypes: ["mark", "frame"] });

function perf_observer(list, observer) {
  // Process the "measure" event
  // ...
  // Disable additional performance events
  observer.disconnect();
}
var observer2 = new PerformanceObserver(perf_observer);
observer2.observe({ entryTypes: ["measure"] });