sortNumbers.js

// time sortNumbers.js => 0.196
function randomInteger(lowerBound, upperBound) {
  return lowerBound + Math.floor(Math.random() * (upperBound - lowerBound));
}

function* randomNumbers(count) {
  for (var i=0; i < count; i++) {
    yield randomInteger(1, 10);
  }
}

function cmp(a, b) {
  return a - b;
}

var a = Array.from(randomNumbers(100000));
console.time("sort")
a.sort(cmp);
console.timeEnd("sort") // => 10ms

sortPersons.js

"use strict";

var idCount = 1;
function nextId() {
  return idCount++;
}

function randomString() {
  return Math.random().toString(36).replace(/[^a-z]+/g, '').substr(0, 5);
  return "a";
}

function randomInteger(lowerBound, upperBound) {
  return lowerBound + Math.floor(Math.random() * (upperBound - lowerBound));
}

function cmpPersons(a, b) {
  return a.age - b.age;
}

class Person {
  constructor() {
    this.id = nextId();
    this.name = randomString();
    this.age = randomInteger(1, 100);
  }
}

function* randomPersons(count) {
  for (var i=0; i < count; i++) {
    yield new Person();
  }
}

var ps = Array.from(randomPersons(100000))
console.time("sort")
ps.sort(cmpPersons);
console.timeEnd("sort") // => 33ms