text: function microtime (getAsFloat) {
    //  discuss at: http://locutus.io/php/microtime/
    // original by: Paulo Freitas
    // improved by: Dumitru Uzun (http://duzun.me)
    //   example 1: var $timeStamp = microtime(true)
    //   example 1: $timeStamp > 1000000000 && $timeStamp < 2000000000
    //   returns 1: true
    //   example 2: /^0\.[0-9]{1,6} [0-9]{10,10}$/.test(microtime())
    //   returns 2: true
  
    var s
    var now
    if (typeof performance !== 'undefined' && performance.now) {
      now = (performance.now() + performance.timing.navigationStart) / 1e3
      if (getAsFloat) {
        return now
      }
  
      // Math.round(now)
      s = now | 0
  
      return (Math.round((now - s) * 1e6) / 1e6) + ' ' + s
    } else {
      now = (Date.now ? Date.now() : new Date().getTime()) / 1e3
      if (getAsFloat) {
        return now
      }
  
      // Math.round(now)
      s = now | 0
  
      return (Math.round((now - s) * 1e3) / 1e3) + ' ' + s
    }
  }
  