Bench Arr.some vs Set.has

bench-some-vs-set.js

const Benchmark = require('benchmark').Benchmark;
const suite = new Benchmark.Suite;

const users = new Array(50).fill().map(gen);
const logins = new Array(10).fill().map(gen);

function random(min, max) {
  return Math.floor(Math.random() * (max - min)) + min;
}

function gen() {
  let text = '';
  let possible = 'abcdefghijklmnopqrstuvwxyz0123456789-';
  let len = random(2, 13)

  for (let i = 0; i < len; i++)
    text += possible.charAt(Math.floor(Math.random() * possible.length));

  return text;
}

suite
	.add('some', function() {
		let x = logins.reduce((accesses, login) => {
            accesses[login] = users.some(user => user.login === login);
            return accesses;
        }, {});
	})
	.add('Set ', function() {
		let users_set = new Set(users);
		let x = logins.reduce((accesses, login) => {
            accesses[login] = users_set.has(login);
            return accesses;
        }, {});
	})
	.on('cycle', function(event) {
		console.log(String(event.target));
	})
	.on('complete', function() {
		console.log('Fastest is ' + this.filter('fastest').map('name'));
	})
	.run({async: true});