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              $bg: #16526B;
$box: #07263B;
$moment: #61CDD5;
$native: #F04E51;

* {
  box-sizing: border-box;
}

html,
body,
#content {
  height: 100%;
}

body {
  background: $bg;
  background-image: linear-gradient(lighten($bg, 2%), darken($bg, 2%));
  background-repeat: no-repeat;
  background-attachment: fixed;
  color: #eee;
  font-family: 'Source Sans Pro', sans-serif;
  padding: 30px;
}

.app {
  display: flex;
  height: 100%;
  flex-direction: column;
  justify-content: center;
  max-width: 1000px;
  margin: 0 auto;
}

.generate {
  text-align: center;
  
  label {
    border: 0;
    clip: rect(1px, 1px, 1px, 1px);
    height: 1px;
    margin: -1px;
    overflow: hidden;
    padding: 0;
    position: absolute;
    width: 1px;
  }
  
  select {
    appearance: none;
    background: white url('http://www.outboundengine.com/wp-content/uploads/2016/03/icon-chevron-down-grey2.svg');
    background-position: center right 15px;
    background-size: auto 10px;
    background-repeat: no-repeat;
    border: none;
    font-size: 26px;
    padding: 10px 40px 10px 15px;
  }

  button {
    background: #218791;
    border: none;
    border-radius: 5px;
    color: white;
    cursor: pointer;
    font-size: 26px;
    margin: 0 0 0 10px;
    padding: 10px 15px;
  }
}

.bms {
  display: flex;
  justify-content: center;
  margin: 30px auto 0;
  width: 100%;
}

.bms__process {
  background: $box;
  box-shadow: 0 2px 10px rgba(0,0,0,.1);
  border-radius: 15px;
  margin: 0 10px;
  padding: 20px 20px 25px;
  width: 26%;
}

.bms__process__title {
  font-size: 16px;
  margin: 0 auto 25px;
  text-align: center;
}

.bms__bm__graph {
  background: #0D4149;
  border-radius: 15px;
  box-shadow: 0 0 0 1px  darken(#07263B, 3%);
  padding-right: 80px;
  position: relative;
}

.bms__bm__graph__fill {
  border-radius: 15px;
  font-size: 12px;
  height: 19px;
  min-width: 20px;
  text-align: right;
  transition: width 1s ease-in-out, background 1s ease;
  width: 0%;
}

.bms__bm__graph__fill--empty {
  background: lighten(#0D4149, 5%) !important;
}

.bms__bm--moment .bms__bm__graph__fill {
  background: $moment;
}

.bms__bm--native .bms__bm__graph__fill {
  background: $native;
}

.bms__bm__graph__value {
  font-size: 12px;
  opacity: .8;
  position: absolute;
  right: 10px;
  top: 2px;
}

.bms__bm__label {
  margin: 5px 5px 10px;
}

.bms__bm__check {
  color: #37666F;
  font-size: 12px;
  margin: 20px auto 0;
  text-align: right;
}

.bms__bm__check__status {
  background: #E04149;
  border: 1px solid $box;
  box-shadow: 0 0 0 1px #E04149;
  border-radius: 50%;
  display: inline-block;
  height: 10px;
  margin: -2px 0 0 5px;
  vertical-align: middle;
  width: 10px;
}

.bms__bm__check__status--true {
  background: #25A452;
  box-shadow: 0 0 0 1px #25A452;
}
            
          
!
            
              const PROCESSES = [
  'isToday',
  'isSameMonth',
  'isWithinThirtyDays'
];
const TODAY = new Date();
const YEAR_START = new Date(TODAY.getFullYear(), 0, 1);
const YEAR_END = new Date(TODAY.getFullYear(), 11, 31);

class App extends React.Component {
  constructor () {
    super();
    
    this.state = {
      dataSet: [],
      de: [],
      tGenerate: null,
      isTodayMoment: null,
      isTodayNative: null
    };
    
    this.start = this.start.bind(this);
    this.getData = this.getData.bind(this);
    this.isToday = this.isToday.bind(this);
  }

  start () {
    const dataSet = this.getData(this.entries.value);
    this.setState({dataSet: dataSet});
  }

  getRandomDate (start = YEAR_START, end = YEAR_END) {
    return new Date(start.getTime() + Math.random() * (end.getTime() - start.getTime()));
  }
  
  getData (entries) {
    const dataSet = [];
    const tGenerateA = performance.now();
    
    for (let i = 0; i <= entries; i++) {
      dataSet.push({
        id: i,
        date: this.getRandomDate()
      });
    }
    
    const tGenerateB = performance.now();
    
    this.setState({tGenerate: tGenerateB - tGenerateA});
    
    PROCESSES.forEach(processName => {
      this.processDataset(processName, dataSet);
      this.processDataset(processName, dataSet, false);
    });
    
    return dataSet;
  }
  
  updateState (useMoment, name, newValues) {
    const setName = useMoment ? `${name}Moment` : `${name}Native`;
    this.setState({[setName]: newValues});
  }
  
  isToday (data, useMoment, today) {
    if (useMoment) {
      const day = moment(data.date);
      return today.isSame(day, 'day');
    } else {
      const day = new Date(data.date);
      return today.getDate() === day.getDate() &&
        today.getMonth() === day.getMonth() &&
        today.getFullYear() === day.getFullYear() ? 1 : 0;
    }
  }
  
  isSameMonth (data, useMoment, today) {
    if (useMoment) {
      const day = moment(data.date);
      return today.isSame(day, 'month');
    } else {
      const day = new Date(data.date);
      return today.getMonth() === day.getMonth() &&
        today.getFullYear() === day.getFullYear() ? 1 : 0;
    }
  }
  
  isWithinThirtyDays (data, useMoment, today, thirtyDays) {
    if (useMoment) {
      return moment(data.date).isBetween(today, thirtyDays);
    } else {
      const day = new Date(data.date).getTime();
      return day > today.getTime() && day < thirtyDays.getTime();
    }
  }
  
  processDataset (processName, dataSet, useMoment = true) {
    const tA = performance.now();
    const today = useMoment ? moment(TODAY) : new Date(TODAY);
    const thirtyDays = useMoment ? today.clone().add(30, 'days') : new Date(today.getTime() + (30 * 24 * 60 * 60 * 1000));
    
    const total = dataSet.reduce((count, data) => {
      switch (processName) {
        case 'isToday':
        case 'isSameMonth':
          count += this[processName](data, useMoment, today) ? 1 : 0;
        case 'isWithinThirtyDays':
          count += this.isWithinThirtyDays(data, useMoment, today, thirtyDays) ? 1 : 0;
      }
      return count;
    }, 0);

    const tB = performance.now();
    
    this.updateState(useMoment, processName, {
      time: tB - tA,
      value: total
    });
  }
  
  render () {
    return (
      <div className='app'>
        <div className='generate'>
          <label htmlFor='size'>Size of Data</label>
          <select id='size' ref={c => this.entries = c}>
            <option value={500}>500</option>
            <option value={1000} selected>1,000</option>
            <option value={10000}>10,000</option>
            <option value={25000}>25,000</option>
          </select>
          <button type='button' onClick={this.start}>RUN TEST</button>
        </div>
        <div className='bms'>
          {PROCESSES.map((processName, i) => {
            const sMoment = this.state[`${processName}Moment`];
            const sNative = this.state[`${processName}Native`];
            
            const tMoment = sMoment ? sMoment.time : 0;
            const tNative = sNative ? sNative.time : 0;
            const total = tMoment + tNative;
            const pMoment =  tMoment / total * 100;
            const pNative =  tNative / total * 100;
            const intCheck = sMoment && sNative ? sMoment.value === sNative.value : false;
              
            return (
              <div key={i} className='bms__process'>
                <h2 className='bms__process__title'>{processName}</h2>
                <div className='bms__bm bms__bm--moment'>
                  <div className='bms__bm__graph'>
                    <div className={`bms__bm__graph__fill ${!!this.state.dataSet.length ? '' 
: 'bms__bm__graph__fill--empty'}`} style={{width: pMoment + '%'}} />
                    <div className='bms__bm__graph__value'>{tMoment.toFixed(3)}ms</div>
                  </div>
                  <div className='bms__bm__label'>Moment.js</div>
                </div>
                
                <div className='bms__bm bms__bm--native'>
                  <div className='bms__bm__graph'>
                    <div className={`bms__bm__graph__fill ${!!this.state.dataSet.length ? '' 
: 'bms__bm__graph__fill--empty'}`} style={{width: pNative + '%'}} />
                    <div className='bms__bm__graph__value'>{tNative.toFixed(3)}ms</div>
                  </div>
                  <div className='bms__bm__label'>Native</div>
                </div>
                
                <div className='bms__bm__check'>
                  Integrity Check
                  <span className={`bms__bm__check__status bms__bm__check__status--${intCheck}`}></span>
                </div>
              </div>
            );    
          })}
        </div>
      </div>
    )
  }
}

ReactDOM.render(
  <App />,
  document.getElementById('content')
);
            
          
!
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