text: /* 7037
   * (?<!\\)\[(\\\[|\\\]|[^\[\]]|(?<!\\)\[.*(?<!\\)\])*(?<!\\)\]
   * EXPONENT
   * nums:3
   * EXPONENT AttackString:"["+"[\\[]"*32+"◎@! _1_EOA(i or ii)"
   */
  var REGEX = /(?<!\\)\[(\\\[|\\\]|[^\[\]]|(?<!\\)\[.*(?<!\\)\])*(?<!\\)\]/
  for(var i = 1; i <= 5000000; i++) {
      var time = Date.now();
      var attack_str = '[' + '[\\[]'.repeat(i*1) + '◎@! _1_EOA(i or ii)'
      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 * 1 + ": " + time_cost+" ms")
  }