benchmark.js

/* jshint esversion: 6 */
"use strict";
const Benchmark = require('benchmark');
let suite = new Benchmark.Suite;

class Thingy {
    constructor(obj) {
        this.obj = obj;
    }

    get a() { return this.obj.a; }
    get b() { return this.obj.b; }
    get c() { return this.obj.c; }
}

suite.add('raw object', function() {
    let o = {
        a: 1,
        b: 2,
        c: 3
    };
    let b = o.a + o.c;
}).add('raw copied object', function() {
    let o1 = {
        a: 1,
        b: 2,
        c: 3
    };
    let o = [];
    for (let fldname in o1) {
        o[fldname] = o1[fldname];
    }
    let b = o.a + o.c;
}).add('new object', () => {
    let o = new Thingy({
        a: 1,
        b: 2,
        c: 3
    });
    const b = o.a + o.c;
}).on('cycle', function(event) {
    console.log(String(event.target));
}).on('complete', function(event) {
    console.log('Fastest is ' + this.filter('fastest').map('name'));
}).run({async: true});