Run results for: Array vs Object vs Map access given strings indices (2)

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36

Browser: Chrome 121

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

array 2

121K/s

array 1

89K/s

Map

75K/s

object 2

186/s

object 1

186/s

View exact numbers

Test name	Executions per second
✓ array 2	121,037 Ops/sec
array 1	89,355 Ops/sec
Map	75,124 Ops/sec
object 2	186 Ops/sec
object 1	186 Ops/sec

Script Preparation code:

var data = [
    "0",
    "1",
    "2",
    "3",
    "4",
    "5",
    "6",
    "7",
    "8",
    "9",
    "10",
    "11",
    "12",
    "13",
    "14",
    "15",
    "16",
    "17",
    "18",
    "19",
    "20",
    "21",
    "22",
    "23",
    "24",
    "25",
    "26",
    "27",
    "28",
    "29"
]

Tests:

Map
var map = new Map(data.map((v, i) => [String(i), v])); let count = 0 for (let i=0; i<data.length; i++) { count += parseInt(map.get(String(i))) }
array 1
var array = data; let count = 0 for (let i=0; i<data.length; i++) { count += parseInt(array[parseInt(String(i))]) }
object 1
var object = Object.assign({}, data) let count = 0 for (let c=0; c<1000; c++) { for (let i=0; i<data.length; i++) { count += object[String(i)] } }
object 2
var object = {...data} let count = 0 for (let c=0; c<1000; c++) { for (let i=0; i<data.length; i++) { count += object[String(i)] } }
array 2
var array = data; let count = 0 for (let i=0; i<data.length; i++) { count += parseInt(array[String(i)]) }