Run results for: Set/Map symbol vs Obj vs String vs Number

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:128.0) Gecko/20100101 Firefox/128.0

Browser: Firefox 128

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: 5 months ago

Test name	Executions per second
map add NUMBER	14908.4 Ops/sec
map add String	10244.8 Ops/sec
map add Object	8210.2 Ops/sec
map add Symbol	13023.2 Ops/sec

Script Preparation code:

var arr = Array.from({length: 1000}).map((_, i) => i);
var arrNum = arr.map(v => Number(v));
var arrStr = arr.map(String);
var arrObj = arr.map(v=>{return {[v]: v}})
var arrSymb = arr.map(Symbol)

Tests:

map add NUMBER
const m = new Map(); arrNum.forEach(v => m.set(v, v)) arrNum.forEach(v => m.has(v)) arrNum.forEach(v => m.get(v)) arrNum.forEach(v => m.delete(v))
map add String
const m = new Map(); arrStr.forEach(v => m.set(v, v)) arrStr.forEach(v => m.has(v)) arrStr.forEach(v => m.get(v)) arrStr.forEach(v => m.delete(v))
map add Object
const m = new Map(); arrObj.forEach(v => m.set(v, v)) arrObj.forEach(v => m.has(v)) arrObj.forEach(v => m.get(v)) arrObj.forEach(v => m.delete(v))
map add Symbol
const m = new Map(); arrSymb.forEach(v => m.set(v, v)) arrSymb.forEach(v => m.set(v)) arrSymb.forEach(v => m.get(v)) arrSymb.forEach(v => m.delete(v))

Run results for: Set/Map symbol vs Obj vs String vs Number

map add NUMBER

map add String

map add Object

map add Symbol