Performance difference between array.find vs array.indexOf. Result: indexOf is faster ;)

performanceTest1a.js

// ES5

var list = [];
for (var i =0, len = 500000; i < len; i++) {
  list.push(i);
}

console.time("test");
repeater(20, {callback: test1, value: 499999, list: list} );
console.timeEnd("test");

function test1(val, list){
  return list.find(function(el){ return el == val });
}

function test2(val, list){
  return list.indexOf(val);
}

function repeater(times, config){
  for (var i = 0; i < times; i ++) {
    config.callback(config.value, config.list);
  }
}

performanceTest1b.js

// ES6

let list = [];
for (var i =0, len = 500000; i < len; i++) {
  list.push(i);
}

console.time("test");
repeater(20, {callback: test1, value: 499999, list: list} );
console.timeEnd("test");

let test1 = (val, list) => {
  list.find((el) => el == val);
};

let test2 = (val, list) => {
  list.indexOf(val);
};

let repeater = (times, config) => {
  for (var i = 0; i < times; i ++) {
    config.callback(config.value, config.list);
  }
};