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

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36

Browser: Chrome 119

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
array	68897.5 Ops/sec
set	61117.0 Ops/sec
Array for Each	26612.8 Ops/sec
Set for Each	12677.1 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)

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

array

set

Array for Each

Set for Each