Run results for: set vs array iteration + for each - large arrays - sum

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/148.0.0.0 Safari/537.36

Browser: Chrome 148

Operating system: Windows

Device Platform: Desktop

Date tested: 2 months ago

array

86K/s

set

85K/s

Array for Each

40K/s

Set for Each

17K/s

View exact numbers

Test name	Executions per second
✓ array	86,308 Ops/sec
set	84,817 Ops/sec
Array for Each	39,889 Ops/sec
Set for Each	16,858 Ops/sec

Script Preparation code:

const base = Array.from(Array(10000).keys())

var a = base.map(Math.random);
var b = new Set(base.map(Math.random))
var c = new Set(base.map(Math.random))
var d = base.map(Math.random);

Tests:

array
let sum = 0 for (const x of a) {sum += x}
set
let sum = 0 for (const x of b) {sum += x}
Array for Each
let sum = 0 d.forEach(x => sum += x)
Set for Each
let sum = 0 c.forEach(x => sum += x)