Run results for: unique set or object

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36

Browser: Chrome 124

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Set number

4K/s

Object number

3K/s

object filter number

3K/s

object filter string

3K/s

Set string

3K/s

Object string

789/s

View exact numbers

Test name	Executions per second
✓ Set number	3,606 Ops/sec
Object number	3,447 Ops/sec
object filter number	3,341 Ops/sec
object filter string	3,310 Ops/sec
Set string	2,892 Ops/sec
Object string	789 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)));