Run results for: Array vs Map vs object iteration 2

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_3) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.0.5 Safari/605.1.15

Browser: Safari 13

Operating system: Mac OS X 10.15.3

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
Array.forEach	4747.5 Ops/sec
Array for...of	5720.8 Ops/sec
Map.forEach	4872.9 Ops/sec
object for...in	2268.4 Ops/sec

Script Preparation code:

var array = []
var map = new Map()
var object = {}
for (var i = 0; i < 2000; i++) {
    array[i] = i;
    map.set(i.toString(), i);
    object[i.toString()] = i;
}
var results = []

Tests:

Array.forEach
array.forEach(i => { results.push(i * 2) })
Array for...of
for (const i of array) { results.push(i * 2) }
Map.forEach
map.forEach(i => { results.push(i * 2) })
object for...in
for (const i in object) { results.push(object[i] * 2) }

Run results for: Array vs Map vs object iteration 2

Array.forEach

Array for...of

Map.forEach

object for...in