Run results for: unique set or object

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:125.0) Gecko/20100101 Firefox/125.0

Browser: Firefox 125

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
Set	7395.5 Ops/sec
Object	21481.3 Ops/sec

Script Preparation code:

var a = new Array(10000).fill(0).map(() => Math.floor(Math.random() * 10000));
var b = new Array(10000).fill(0).map(() => Math.floor(Math.random() * 10000).toString(32));

Tests:

Set number
var u = [...new Set(a).keys()]
Object number
var u = Object.values(a.reduce( (res, k) => { res[k] ??= k; return res; },{} ));
object filter number
const f = new Set(); return a.filter((v) => (f.has(v) ? false : f.add(v)));
Set string
var u = [...new Set(b).keys()]
Object string
var u = Object.values(b.reduce( (res, k) => { res[k] ??= k; return res; },{} ));
object filter string
const f = new Set(); return b.filter((v) => (f.has(v) ? false : f.add(v)));

Run results for: unique set or object

Set number

Object number

object filter number

Set string

Object string

object filter string