Function performanceMeasure

packages/zone.js/lib/zone-impl.ts:780–782

(name: string, label: string)

    performance && performance['mark'] && performance['mark'](name);
  }
  function performanceMeasure(name: string, label: string) {
    performance && performance['measure'] && performance['measure'](name, label);
  }
  mark('Zone');

  class ZoneImpl implements AmbientZone {