Function mark

packages/zone.js/lib/zone-impl.ts:777–779

(name: string)

  const performance: {mark(name: string): void; measure(name: string, label: string): void} =
    global['performance'];
  function mark(name: string) {
    performance && performance['mark'] && performance['mark'](name);
  }
  function performanceMeasure(name: string, label: string) {
    performance && performance['measure'] && performance['measure'](name, label);
  }