text: import animationFrames from 'callbag-animation-frames';
  import defer from 'callbag-defer';
  import map from 'callbag-map';
  
  var index = /*#__PURE__*/
  defer(function () {
    var start = Date.now();
    return map(function () {
      return Date.now() - start;
    })(animationFrames);
  });
  
  export default index;
  