Run results for: Map vs Property Accessor

Run details:
User agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/93.0.4577.99 Safari/537.36
Browser: Chrome 93
Operating system: Windows 7
Device Platform: Desktop
Date tested: one year ago
Test name	Executions per second
Class with Getters	5720.9 Ops/sec
Class with Props in Map	2085.5 Ops/sec
Script Preparation code:
var HEROES = [
  ["Tony", "Stark", 35, "Iron Man", ["Avengers"]],
  ["Peter", "Parker", 20, "Spiderman", ["Avengers"]],
  ["Steve", "Rogers", 80, "Captain America", ["Howling Commandos", "Avengers"]],
  ["Jessica", "Jones", 33, "Jewel", ["Defenders", "Avengers"]],
  ["Luke", "Cage", 34, "Power Man", ["Defenders", "Avengers"]],
  ["Tony", "Stark", 35, "Iron Man", ["Avengers"]],
  ["Peter", "Parker", 20, "Spiderman", ["Avengers"]],
  ["Steve", "Rogers", 80, "Captain America", ["Howling Commandos", "Avengers"]],
  ["Jessica", "Jones", 33, "Jewel", ["Defenders", "Avengers"]],
  ["Luke", "Cage", 34, "Power Man", ["Defenders", "Avengers"]],
  ["Tony", "Stark", 35, "Iron Man", ["Avengers"]],
  ["Peter", "Parker", 20, "Spiderman", ["Avengers"]],
  ["Steve", "Rogers", 80, "Captain America", ["Howling Commandos", "Avengers"]],
  ["Jessica", "Jones", 33, "Jewel", ["Defenders", "Avengers"]],
  ["Luke", "Cage", 34, "Power Man", ["Defenders", "Avengers"]],
  ["Tony", "Stark", 35, "Iron Man", ["Avengers"]],
  ["Peter", "Parker", 20, "Spiderman", ["Avengers"]],
  ["Steve", "Rogers", 80, "Captain America", ["Howling Commandos", "Avengers"]],
  ["Jessica", "Jones", 33, "Jewel", ["Defenders", "Avengers"]],
  ["Luke", "Cage", 34, "Power Man", ["Defenders", "Avengers"]],
  ["Tony", "Stark", 35, "Iron Man", ["Avengers"]],
  ["Peter", "Parker", 20, "Spiderman", ["Avengers"]],
  ["Steve", "Rogers", 80, "Captain America", ["Howling Commandos", "Avengers"]],
  ["Jessica", "Jones", 33, "Jewel", ["Defenders", "Avengers"]],
  ["Luke", "Cage", 34, "Power Man", ["Defenders", "Avengers"]],
  ["Tony", "Stark", 35, "Iron Man", ["Avengers"]],
  ["Peter", "Parker", 20, "Spiderman", ["Avengers"]],
  ["Steve", "Rogers", 80, "Captain America", ["Howling Commandos", "Avengers"]],
  ["Jessica", "Jones", 33, "Jewel", ["Defenders", "Avengers"]],
  ["Luke", "Cage", 34, "Power Man", ["Defenders", "Avengers"]],
  ["Tony", "Stark", 35, "Iron Man", ["Avengers"]],
  ["Peter", "Parker", 20, "Spiderman", ["Avengers"]],
  ["Steve", "Rogers", 80, "Captain America", ["Howling Commandos", "Avengers"]],
  ["Jessica", "Jones", 33, "Jewel", ["Defenders", "Avengers"]],
  ["Luke", "Cage", 34, "Power Man", ["Defenders", "Avengers"]],
  ["Tony", "Stark", 35, "Iron Man", ["Avengers"]],
  ["Peter", "Parker", 20, "Spiderman", ["Avengers"]],
  ["Steve", "Rogers", 80, "Captain America", ["Howling Commandos", "Avengers"]],
  ["Jessica", "Jones", 33, "Jewel", ["Defenders", "Avengers"]],
  ["Luke", "Cage", 34, "Power Man", ["Defenders", "Avengers"]],
  ["Tony", "Stark", 35, "Iron Man", ["Avengers"]],
  ["Peter", "Parker", 20, "Spiderman", ["Avengers"]],
  ["Steve", "Rogers", 80, "Captain America", ["Howling Commandos", "Avengers"]],
  ["Jessica", "Jones", 33, "Jewel", ["Defenders", "Avengers"]],
  ["Luke", "Cage", 34, "Power Man", ["Defenders", "Avengers"]],
  ["Tony", "Stark", 35, "Iron Man", ["Avengers"]],
  ["Peter", "Parker", 20, "Spiderman", ["Avengers"]],
  ["Steve", "Rogers", 80, "Captain America", ["Howling Commandos", "Avengers"]],
  ["Jessica", "Jones", 33, "Jewel", ["Defenders", "Avengers"]],
  ["Luke", "Cage", 34, "Power Man", ["Defenders", "Avengers"]],
  ["Tony", "Stark", 35, "Iron Man", ["Avengers"]],
  ["Peter", "Parker", 20, "Spiderman", ["Avengers"]],
  ["Steve", "Rogers", 80, "Captain America", ["Howling Commandos", "Avengers"]],
  ["Jessica", "Jones", 33, "Jewel", ["Defenders", "Avengers"]],
  ["Luke", "Cage", 34, "Power Man", ["Defenders", "Avengers"]],
  ["Tony", "Stark", 35, "Iron Man", ["Avengers"]],
  ["Peter", "Parker", 20, "Spiderman", ["Avengers"]],
  ["Steve", "Rogers", 80, "Captain America", ["Howling Commandos", "Avengers"]],
  ["Jessica", "Jones", 33, "Jewel", ["Defenders", "Avengers"]],
  ["Luke", "Cage", 34, "Power Man", ["Defenders", "Avengers"]],
  ["Tony", "Stark", 35, "Iron Man", ["Avengers"]],
  ["Peter", "Parker", 20, "Spiderman", ["Avengers"]],
  ["Steve", "Rogers", 80, "Captain America", ["Howling Commandos", "Avengers"]],
  ["Jessica", "Jones", 33, "Jewel", ["Defenders", "Avengers"]],
  ["Luke", "Cage", 34, "Power Man", ["Defenders", "Avengers"]],
  ["Tony", "Stark", 35, "Iron Man", ["Avengers"]],
  ["Peter", "Parker", 20, "Spiderman", ["Avengers"]],
  ["Steve", "Rogers", 80, "Captain America", ["Howling Commandos", "Avengers"]],
  ["Jessica", "Jones", 33, "Jewel", ["Defenders", "Avengers"]],
  ["Luke", "Cage", 34, "Power Man", ["Defenders", "Avengers"]],
  ["Tony", "Stark", 35, "Iron Man", ["Avengers"]],
  ["Peter", "Parker", 20, "Spiderman", ["Avengers"]],
  ["Steve", "Rogers", 80, "Captain America", ["Howling Commandos", "Avengers"]],
  ["Jessica", "Jones", 33, "Jewel", ["Defenders", "Avengers"]],
  ["Luke", "Cage", 34, "Power Man", ["Defenders", "Avengers"]],
  ["Tony", "Stark", 35, "Iron Man", ["Avengers"]],
  ["Peter", "Parker", 20, "Spiderman", ["Avengers"]],
  ["Steve", "Rogers", 80, "Captain America", ["Howling Commandos", "Avengers"]],
  ["Jessica", "Jones", 33, "Jewel", ["Defenders", "Avengers"]],
  ["Luke", "Cage", 34, "Power Man", ["Defenders", "Avengers"]],
  ["Tony", "Stark", 35, "Iron Man", ["Avengers"]],
  ["Peter", "Parker", 20, "Spiderman", ["Avengers"]],
  ["Steve", "Rogers", 80, "Captain America", ["Howling Commandos", "Avengers"]],
  ["Jessica", "Jones", 33, "Jewel", ["Defenders", "Avengers"]],
  ["Luke", "Cage", 34, "Power Man", ["Defenders", "Avengers"]],
  ["Tony", "Stark", 35, "Iron Man", ["Avengers"]],
  ["Peter", "Parker", 20, "Spiderman", ["Avengers"]],
  ["Steve", "Rogers", 80, "Captain America", ["Howling Commandos", "Avengers"]],
  ["Jessica", "Jones", 33, "Jewel", ["Defenders", "Avengers"]],
  ["Luke", "Cage", 34, "Power Man", ["Defenders", "Avengers"]],
  ["Tony", "Stark", 35, "Iron Man", ["Avengers"]],
  ["Peter", "Parker", 20, "Spiderman", ["Avengers"]],
  ["Steve", "Rogers", 80, "Captain America", ["Howling Commandos", "Avengers"]],
  ["Jessica", "Jones", 33, "Jewel", ["Defenders", "Avengers"]],
  ["Luke", "Cage", 34, "Power Man", ["Defenders", "Avengers"]],
  ["Tony", "Stark", 35, "Iron Man", ["Avengers"]],
  ["Peter", "Parker", 20, "Spiderman", ["Avengers"]],
  ["Steve", "Rogers", 80, "Captain America", ["Howling Commandos", "Avengers"]],
  ["Jessica", "Jones", 33, "Jewel", ["Defenders", "Avengers"]],
  ["Luke", "Cage", 34, "Power Man", ["Defenders", "Avengers"]],
  ["Tony", "Stark", 35, "Iron Man", ["Avengers"]],
  ["Peter", "Parker", 20, "Spiderman", ["Avengers"]],
  ["Steve", "Rogers", 80, "Captain America", ["Howling Commandos", "Avengers"]],
  ["Jessica", "Jones", 33, "Jewel", ["Defenders", "Avengers"]],
  ["Luke", "Cage", 34, "Power Man", ["Defenders", "Avengers"]],
  ["Tony", "Stark", 35, "Iron Man", ["Avengers"]],
  ["Peter", "Parker", 20, "Spiderman", ["Avengers"]],
  ["Steve", "Rogers", 80, "Captain America", ["Howling Commandos", "Avengers"]],
  ["Jessica", "Jones", 33, "Jewel", ["Defenders", "Avengers"]],
  ["Luke", "Cage", 34, "Power Man", ["Defenders", "Avengers"]],
  ["Tony", "Stark", 35, "Iron Man", ["Avengers"]],
  ["Peter", "Parker", 20, "Spiderman", ["Avengers"]],
  ["Steve", "Rogers", 80, "Captain America", ["Howling Commandos", "Avengers"]],
  ["Jessica", "Jones", 33, "Jewel", ["Defenders", "Avengers"]],
  ["Luke", "Cage", 34, "Power Man", ["Defenders", "Avengers"]],
  ["Tony", "Stark", 35, "Iron Man", ["Avengers"]],
  ["Peter", "Parker", 20, "Spiderman", ["Avengers"]],
  ["Steve", "Rogers", 80, "Captain America", ["Howling Commandos", "Avengers"]],
  ["Jessica", "Jones", 33, "Jewel", ["Defenders", "Avengers"]],
  ["Luke", "Cage", 34, "Power Man", ["Defenders", "Avengers"]],
  ["Tony", "Stark", 35, "Iron Man", ["Avengers"]],
  ["Peter", "Parker", 20, "Spiderman", ["Avengers"]],
  ["Steve", "Rogers", 80, "Captain America", ["Howling Commandos", "Avengers"]],
  ["Jessica", "Jones", 33, "Jewel", ["Defenders", "Avengers"]],
  ["Luke", "Cage", 34, "Power Man", ["Defenders", "Avengers"]],
  ["Tony", "Stark", 35, "Iron Man", ["Avengers"]],
  ["Peter", "Parker", 20, "Spiderman", ["Avengers"]],
  ["Steve", "Rogers", 80, "Captain America", ["Howling Commandos", "Avengers"]],
  ["Jessica", "Jones", 33, "Jewel", ["Defenders", "Avengers"]],
  ["Luke", "Cage", 34, "Power Man", ["Defenders", "Avengers"]],
  ["Tony", "Stark", 35, "Iron Man", ["Avengers"]],
  ["Peter", "Parker", 20, "Spiderman", ["Avengers"]],
  ["Steve", "Rogers", 80, "Captain America", ["Howling Commandos", "Avengers"]],
  ["Jessica", "Jones", 33, "Jewel", ["Defenders", "Avengers"]],
  ["Luke", "Cage", 34, "Power Man", ["Defenders", "Avengers"]],
  ["Tony", "Stark", 35, "Iron Man", ["Avengers"]],
  ["Peter", "Parker", 20, "Spiderman", ["Avengers"]],
  ["Steve", "Rogers", 80, "Captain America", ["Howling Commandos", "Avengers"]],
  ["Jessica", "Jones", 33, "Jewel", ["Defenders", "Avengers"]],
  ["Luke", "Cage", 34, "Power Man", ["Defenders", "Avengers"]],
  ["Tony", "Stark", 35, "Iron Man", ["Avengers"]],
  ["Peter", "Parker", 20, "Spiderman", ["Avengers"]],
  ["Steve", "Rogers", 80, "Captain America", ["Howling Commandos", "Avengers"]],
  ["Jessica", "Jones", 33, "Jewel", ["Defenders", "Avengers"]],
  ["Luke", "Cage", 34, "Power Man", ["Defenders", "Avengers"]],
  ["Tony", "Stark", 35, "Iron Man", ["Avengers"]],
  ["Peter", "Parker", 20, "Spiderman", ["Avengers"]],
  ["Steve", "Rogers", 80, "Captain America", ["Howling Commandos", "Avengers"]],
  ["Jessica", "Jones", 33, "Jewel", ["Defenders", "Avengers"]],
  ["Luke", "Cage", 34, "Power Man", ["Defenders", "Avengers"]],
  ["Tony", "Stark", 35, "Iron Man", ["Avengers"]],
  ["Peter", "Parker", 20, "Spiderman", ["Avengers"]],
  ["Steve", "Rogers", 80, "Captain America", ["Howling Commandos", "Avengers"]],
  ["Jessica", "Jones", 33, "Jewel", ["Defenders", "Avengers"]],
  ["Luke", "Cage", 34, "Power Man", ["Defenders", "Avengers"]],
  ["Tony", "Stark", 35, "Iron Man", ["Avengers"]],
  ["Peter", "Parker", 20, "Spiderman", ["Avengers"]],
  ["Steve", "Rogers", 80, "Captain America", ["Howling Commandos", "Avengers"]],
  ["Jessica", "Jones", 33, "Jewel", ["Defenders", "Avengers"]],
  ["Luke", "Cage", 34, "Power Man", ["Defenders", "Avengers"]],
  ["Tony", "Stark", 35, "Iron Man", ["Avengers"]],
  ["Peter", "Parker", 20, "Spiderman", ["Avengers"]],
  ["Steve", "Rogers", 80, "Captain America", ["Howling Commandos", "Avengers"]],
  ["Jessica", "Jones", 33, "Jewel", ["Defenders", "Avengers"]],
  ["Luke", "Cage", 34, "Power Man", ["Defenders", "Avengers"]],
  ["Tony", "Stark", 35, "Iron Man", ["Avengers"]],
  ["Peter", "Parker", 20, "Spiderman", ["Avengers"]],
  ["Steve", "Rogers", 80, "Captain America", ["Howling Commandos", "Avengers"]],
  ["Jessica", "Jones", 33, "Jewel", ["Defenders", "Avengers"]],
  ["Luke", "Cage", 34, "Power Man", ["Defenders", "Avengers"]],
  ["Tony", "Stark", 35, "Iron Man", ["Avengers"]],
  ["Peter", "Parker", 20, "Spiderman", ["Avengers"]],
  ["Steve", "Rogers", 80, "Captain America", ["Howling Commandos", "Avengers"]],
  ["Jessica", "Jones", 33, "Jewel", ["Defenders", "Avengers"]],
  ["Luke", "Cage", 34, "Power Man", ["Defenders", "Avengers"]],
  ["Tony", "Stark", 35, "Iron Man", ["Avengers"]],
  ["Peter", "Parker", 20, "Spiderman", ["Avengers"]],
  ["Steve", "Rogers", 80, "Captain America", ["Howling Commandos", "Avengers"]],
  ["Jessica", "Jones", 33, "Jewel", ["Defenders", "Avengers"]],
  ["Luke", "Cage", 34, "Power Man", ["Defenders", "Avengers"]],
  ["Tony", "Stark", 35, "Iron Man", ["Avengers"]],
  ["Peter", "Parker", 20, "Spiderman", ["Avengers"]],
  ["Steve", "Rogers", 80, "Captain America", ["Howling Commandos", "Avengers"]],
  ["Jessica", "Jones", 33, "Jewel", ["Defenders", "Avengers"]],
  ["Luke", "Cage", 34, "Power Man", ["Defenders", "Avengers"]],
  ["Tony", "Stark", 35, "Iron Man", ["Avengers"]],
  ["Peter", "Parker", 20, "Spiderman", ["Avengers"]],
  ["Steve", "Rogers", 80, "Captain America", ["Howling Commandos", "Avengers"]],
  ["Jessica", "Jones", 33, "Jewel", ["Defenders", "Avengers"]],
  ["Luke", "Cage", 34, "Power Man", ["Defenders", "Avengers"]],
  ["Tony", "Stark", 35, "Iron Man", ["Avengers"]],
  ["Peter", "Parker", 20, "Spiderman", ["Avengers"]],
  ["Steve", "Rogers", 80, "Captain America", ["Howling Commandos", "Avengers"]],
  ["Jessica", "Jones", 33, "Jewel", ["Defenders", "Avengers"]],
  ["Luke", "Cage", 34, "Power Man", ["Defenders", "Avengers"]],
  ["Tony", "Stark", 35, "Iron Man", ["Avengers"]],
  ["Peter", "Parker", 20, "Spiderman", ["Avengers"]],
  ["Steve", "Rogers", 80, "Captain America", ["Howling Commandos", "Avengers"]],
  ["Jessica", "Jones", 33, "Jewel", ["Defenders", "Avengers"]],
  ["Luke", "Cage", 34, "Power Man", ["Defenders", "Avengers"]],
];
class Superhero {
  #name;
  #lastName;
  #age;
  #alterEgo;
  #teams;

  constructor(name, lastName, age, alterEgo, teams) {
    this.#name = name;
    this.#lastName = lastName;
    this.#age = age;
    this.#alterEgo = alterEgo;
    this.#teams = teams;
  }

  get name() {
    return this.#name;
  }
  get lastName() {
    return this.#lastName;
  }
  get age() {
    return this.#age;
  }
  get alterEgo() {
    return this.#alterEgo;
  }
  get teams() {
    return this.#teams;
  }

  toObject() {
    return {
      age: this.age,
      alterEgo: this.alterEgo,
      lastName: this.lastName,
      name: this.name,
      teams: this.teams,
    };
  }
}

class SuperheroWithMap {
  #props = new Map();

  constructor(name, lastName, age, alterEgo, teams) {
    this.#props.set("name", name);
    this.#props.set("lastName", lastName);
    this.#props.set("age", age);
    this.#props.set("alterEgo", alterEgo);
    this.#props.set("teams", teams);
  }

  #getProp(key) {
    return this.#props.get(key);
  }

  getName = this.#getProp.bind(this, "name");
  getLastName = this.#getProp.bind(this, "lastName");
  getAge = this.#getProp.bind(this, "age");
  getAlterEgo = this.#getProp.bind(this, "alterEgo");
  getTeams = this.#getProp.bind(this, "teams");

  toObject() {
    return {
      age: this.getAge(),
      alterEgo: this.getAlterEgo(),
      lastName: this.getLastName(),
      name: this.getName(),
      teams: this.getTeams(),
    };
  }
}

function createSuperhero(props) {
  return new Superhero(...props);
}

function createSuperheroWithMap(props) {
  return new SuperheroWithMap(...props);
}
Tests:
Class with Getters
HEROES.map(createSuperhero).map((hero) => hero.toObject());
Class with Props in Map
HEROES.map(createSuperheroWithMap).map((hero) => hero.toObject());
Run results for: Map vs Property Accessor

Class with Getters

Class with Props in Map
