n now();
  }

  setResourceTimingBufferSize(maxSize) {
    validateInternalField(this, kPerformanceBrand, 'Performance');
    if (arguments.length === 0) {
      throw new ERR_MISSING_ARGS('maxSize');
    }
    // unsigned long
    maxSize = convertToInt('maxSize', maxSize, 32);
    return setResourceTimingBufferSize(maxSize);
  }

  get timeOrigin() {
    validateInternalField(this, kPerformanceBrand, 'Performance');
    return getTimeOriginTimestamp();
  }

  toJSON() {
    validateInternalField(this, kPerformanceBrand, 'Performance');
    return {
      nodeTiming: this.nodeTiming,
      timeOrigin: this.timeOrigin,
      eventLoopUtilization: this.eventLoopUtilization(),
    };
  }
}

ObjectDefineProperties(Performance.prototype, {
  clearMarks: kEnumerableProperty,
  clearMeasures: kEnumerableProperty,
  clearResourceTimings: kEnumerableProperty,
  getEntries: kEnumerableProperty,
  getEntriesByName: kEnumerableProperty,
  getEntriesByType: kEnumerableProperty,
  mark: kEnumerableProperty,
  measure: kEnumerableProperty,
  now: kEnumerableProperty,
  timeOrigin: kEnumerableProperty,
  toJSON: kEnumerableProperty,
  setResourceTimingBufferSize: kEnumerableProperty,
  [SymbolToStringTag]: {
    __proto__: null,
    writable: false,
    enumerable: false,
    configurable: true,
    value: 'Performance',
  },

  // Node.js specific extensions.
  eventLoopUtilization: {
    __proto__: null,
    configurable: true,
    // Node.js specific extensions.
    enumerable: false,
    writable: true,
    value: eventLoopUtilization,
  },
  nodeTiming: {
    __proto__: null,
    configurable: true,
    // Node.js specific extensions.
    enumerable: false,
    writable: true,
    value: nodeTiming,
  },
  // In the browser, this function is not public.  However, it must be used inside fetch
  // which is a Node.js dependency, not a internal module
  markResourceTiming: {
    __proto__: null,
    configurable: true,
    // Node.js specific extensions.
    enumerable: false,
    writable: true,
    value: markResourceTiming,
  },
  timerify: {
    __proto__: null,
    configurable: true,
    // Node.js specific extensions.
    enumerable: false,
    writable: true,
    value: timerify,
  },
});
defineEventHandler(Performance.prototype, 'resourcetimingbufferfull');

function createPerformance() {
  return ReflectConstruct(function Performance() {
    initEventTarget(this);
    this[kPerformanceBrand] = true;
  }, [], Performance);
}

const performance = createPerformance();

function dispatchBufferFull(type) {
  const event = new Event(type, {
    [kTrustEvent]: true,
  });
  performance.dispatchEvent(event);
}
setDispatchBufferFull(dispatchBufferFull);

module.exports = {
  Performance,
  performance,
};