text: /* 2424
   * (UPDATE\s+)(\w+)\s+(SET)\s+([\w+\s*=\s*\w+,?\s*]+)\s+(WHERE.+)
   * POLYNOMIAL
   * nums:3
   * POLYNOMIAL AttackString:""+"UPDATE 1 SET "*5000+"!1 _SLQ_2"
   */
  var REGEX = /(UPDATE\s+)(\w+)\s+(SET)\s+([\w+\s*=\s*\w+,?\s*]+)\s+(WHERE.+)/
  for(var i = 1; i <= 5000000; i++) {
      var time = Date.now();
      var attack_str = '' + 'UPDATE 1 SET '.repeat(i*10000) + '!1 _SLQ_2'
      REGEX.exec(attack_str)
      // REGEX.test(attack_str);
      // attack_str.search(REGEX)
      // attack_str.match(REGEX)
      var time_cost = Date.now() - time;
      console.log(i * 10000 + ": " + time_cost+" ms")
  }