Run results for: Dot vs IndexOf 9

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/84.0.4147.135 Safari/537.36

Browser: Chrome 84

Operating system: Windows

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
foundIndex	0.4 Ops/sec
Map	71.4 Ops/sec
Obj	57.3 Ops/sec
Filter	281.4 Ops/sec

Script Preparation code:

var length = 100000
var array = new Array(length / 2).fill().map(() => Math.round(Math.random() * length))
array = array.concat(array)
array.unshift(length + 1)

Tests:

foundIndex
let temp = [] let foundIndex array.forEach((v) => { foundIndex = temp.indexOf(v) if(foundIndex > -1) temp.splice(foundIndex,1) else temp.push(v) })
Map
let tempMap = new Map() array.forEach((v) => { if(tempMap.has(v)) tempMap.delete(v) else tempMap.set(v, 1) })
Obj
let tempObj = {} array.forEach((v) => { if(tempObj[v]) delete tempObj[v] else tempObj[v]= 1 })
Filter
let temp2 = [] array.forEach((v) => { if(temp2.includes(v)) temp2 = temp2.filter((n) => n != v) else temp2.push(v) })

Run results for: Dot vs IndexOf 9

foundIndex

Map

Obj

Filter