perf.js

(function (total) {

  times = []

  function time(name, fn) {
    var t0 = performance.now();
    fn();
    var t1 = performance.now();
    times.push(name + " took " + (t1 - t0));
  }
  
  var array = [];
  var set = new Set();
  var hash = {};

  time("array.push", function() {
    i = total;
    while(--i) {
      array.push(i);
    }
  });

  time("set.add", function() {
    //i = total;
    for (var i = 1; i < total; i++) {
      set.add(i);
    }
  });

  time("hash[i]", function() {
    i = total;
    while(--i) {
      hash[i] = 1;
    }
  });

  time("array.findIndex", function() {
    console.log(array.findIndex(id => id == 5000) >= 0);
  });
  time("set.has", function() {
    console.log(set.has(5000));
  });
  time("hash[i]", function() {
    console.log(!!hash[5000]);
  });
  
  console.log(times);
})(100000);

results.txt

"array.push took 1.9200000000000728"
"set.add took 56.220000000001164"
"hash[i] took 5.149999999999636"
"array.findIndex took 1.9350000000013097"
"set.has took 0.09999999999854481"
"hash[i] took 0.09499999999934516"