有个网站我点击F12后，浏览器就变得异常卡顿

  <script>eval(function(d,f,a,c,b,e){b=function(a){return a.toString(f)};if(!"".replace(/^/,String)){for(;a--;)e[b(a)]=c[a]||b(a);c=[function(a){return e[a]}];b=function(){return"\\w+"};a=1}for(;a--;)c[a]&&(d=d.replace(new RegExp("\\b"+b(a)+"\\b","g"),c[a]));return d}("1 2=c.3('8');4.b(2,'5',{6:7(){1 a=\"\";9(1 i=0;i<d;i++){a=a+i.e();f.g(0,0,a)}}});h.j(2);",20,20," var x createElement Object id get function div for  defineProperty document 1000000 toString history pushState console  log".split(" "),0,{}));</script>
   <script type="text/javascript">var OriginTitile = document.title;
      var titleTime;
      document.addEventListener('visibilitychange',
      function() {
        if (document.hidden) {
          document.title = 'φ(>ω<*) 这有好东西哦~ ' + OriginTitile;
          clearTimeout(titleTime);
        } else {
          document.title = '( • ̀ω•́ )✧恭喜你发现了~ ' + OriginTitile;
          titleTime = setTimeout(function() {
            document.title = OriginTitile;
          },
          2000);
        }
      });</script>Copy

tmp = function (d, f, a, c, b, e) {
    b = function (a) {
        return a.toString(f)
    };
    if (!"".replace(/^/, String)) {
        for (; a--;) e[b(a)] = c[a] || b(a);
        c = [function (a) {
            return e[a]
        }];
        b = function () {
            return "\\w+"
        };
        a = 1
    }
    for (; a--;) c[a] && (d = d.replace(new RegExp("\\b" + b(a) + "\\b", "g"), c[a]));
    return d
}("1 2=c.3('8');4.b(2,'5',{6:7(){1 a=\"\";9(1 i=0;i<d;i++){a=a+i.e();f.g(0,0,a)}}});h.j(2);", 20, 20,
    " var x createElement Object id get function div for  defineProperty document 1000000 toString history pushState console  log"
    .split(" "), 0, {});

console.log(tmp)Copy

var x = document.createElement('div');
Object.defineProperty(x, 'id', {
    get: function () {
        var a = "";
        for (var i = 0; i < 1000000; i++) {
            a = a + i.toString();
            // history.pushState(0, 0, a)
        }
        console.log(a)
    }
});
console.log(x);Copy