Benchmarking creating array from array

loop-create-array.js

const Benchmark = require('benchmark')

const suite = new Benchmark.Suite

const array = [];

for (let i = 0; i < 1000; i++) {
  array.push({ value: i });
}

suite
.add('foreach', () => {
  let res = []
  array.forEach(item => {
    res.push({ value: item.value * 2 });
  });
})
.add('for (const of)', () => {
  let res = []
  for (const item of array) {
    res.push({ value: item.value * 2 });
  }
})
.add('for (let i)', () => {
  let res = []
  for (let i = 0; i < array.length; ++i) {
    const item = array[i];

    res.push({ value: item.value * 2 });
  }
})
.add('map', () => {
  let res = array.map(item => {
    return { value: item.value * 2 }
  });
})
.on('cycle', function(event) {
  console.log(String(event.target));
})
.on('complete', function() {
  console.log('Fastest is ' + this.filter('fastest').map('name'));
})
.run();

results.txt

$ node --version 
v12.13.0
$ node loop-create-array.js
   foreach x 60,450 ops/sec ±8.91% (87 runs sampled)
   for (const of) x 112,013 ops/sec ±1.97% (84 runs sampled)
   for (let i) x 113,350 ops/sec ±2.63% (82 runs sampled)
   map x 153,657 ops/sec ±4.45% (78 runs sampled)
 Fastest is map