JS Collections Access Benchmark

app.js

const Benchmark = require('benchmark')


const start = 2
const end = 5

const suite = new Benchmark.Suite

for (var i = start; i <= end; i++) {
    const n = Math.pow(10, i)
    suite.add(`n = ${n}`, () => addByNumWithDefineProperty(n))
}

suite.on('complete', function() {
    for (var i = 0; i <= end - start; i++) {
        console.log(`${this[i].stats.mean}`)
    }
})
.run({
    async: true,
    maxTime: 1
})


const addByStringWithDefineProperty = n => {
    var c = {}
    var descriptor = { value: 1 }

    for (var i = 0; i < n; i++) {
        Object.defineProperty(c, i.toString(), descriptor)
    }
}


const addByStringWithDefineProperty2 = n => {
    var c = {}
    var descriptor = { value: 1 }

    for (var i = 0; i < n; i++) {
        Object.defineProperty(c, "a" + i.toString(), descriptor)
    }
}


const addByNumWithDefineProperty = n => {
    var c = {}
    var descriptor = { value: 1 }

    for (var i = 0; i < n; i++) {
        Object.defineProperty(c, i, descriptor)
    }
}


const addByStringKeys2 = n => {
    var c = {}

    for (var i = 0; i < n; i++) {
        c[`a${i}`] = 1
    }
}


const addByStringKeys = n => {
    var c = {}

    for (var i = 0; i < n; i++) {
        c[i.toString()] = 1
    }
}


const addByNumKeys = n => {
    var c = {}

    for (var i = 0; i < n; i++) {
        c[i] = 1
    }
}


const push = n => {
    var c = []

    for (var i = 0; i < n; i++) {
        c.push(1)
    }
}


const concatToEnd = n => {
    var s = "";
    
    for (var i = 0; i < N; i++)
    {
        s = s + ("" + i);
    }

    return s;
}


const concatToStart = n => {
    var s = ""

    for (var i = 0; i < n; i++) {
        s = ("" + i) + s
    }
}


const concatToBoth = n => {
    var s = ""

    for (var i = 0; i < n; i++) {
        s = ("" + i) + s + ("" + i)
    }
}


const multiplyString = (s, n) => {
    var result = "";
    
    for (var i = 0; i < n; i++)
    {
        result += s;
    }

    return result;
}