text: function doIndexOf(a) {
    a.indexOf(a.fill(a, Math.log(0), String.prototype.charCodeAt.call("", 20)));
  }
  
  function bar(f) {
    f();
  }
  
  let array = [20];
  
  for (let i = 0; Array.prototype.filter.call(array, function () {
    bar(doIndexOf);
    doIndexOf(array);
  }).findIndex(function () {
    bar(bar);
    doIndexOf(array.slice(0, 20));
  }) < 100000; ++i) {
    bar(() => {
      return doIndexOf(array.reverse().concat(i, array));
    });
  }
  