Run results for: Set vs Object vs Map vs Array (Iteration)

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/137.0.0.0 Safari/537.36

Browser: Chrome 137

Operating system: Windows

Device Platform: Desktop

Date tested: 5 months ago

Test name	Executions per second
Set	19188.0 Ops/sec
Object	6681.3 Ops/sec
Map	14817.5 Ops/sec
Array	91448.4 Ops/sec

Script Preparation code:

const array = Array.from({ length: 10000 }, (_, idx) => idx);
const set = new Set(array);
const object = Object.fromEntries(array.map((x) => [x, true]));
const map = new Map(Object.entries(object));

Tests:

Set
let sum = 0; set.forEach((v) => { sum += v; });
Object
let sum = 0; for(const k in object){ const v = object[k] sum += v; }
Map
let sum = 0; map.forEach((v) => { sum += v; });
Array
let sum = 0; array.forEach((v) => { sum += v; });

Run results for: Set vs Object vs Map vs Array (Iteration)

Compare the speed to retrieve a value from three data structures that can be used for boolean referencing; i.e. for mapping enabled settings.

Set

Object

Map

Array