code: function toArray(id, time) {
    var o = [
      id,
      Math.round(this._now / 1000),
      time,
      this._cmd];
    return o;
  }
docs: Convert this log record to an array, only called if
  the command took longer than the configured slower than
  amount.
  
  @param id The id for the record.
  @param time The execution time in microseconds.