Run results for: find faster - for vs find vs map vs foreach

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 18_2_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/132.0.6834.100 Mobile/15E148 Safari/604.1

Browser: Chrome Mobile iOS 132

Operating system: iOS 18.2.1

Device Platform: Mobile

Date tested: one year ago

for

3.0M/s

prototype.find

2.5M/s

forEach

36K/s

map

36K/s

View exact numbers

Test name	Executions per second
✓ for	2,957,251 Ops/sec
prototype.find	2,510,812 Ops/sec
forEach	35,807 Ops/sec
map	35,665 Ops/sec

Script Preparation code:

var arr = []
let i = 0
let len = 1000
for(;i<len;i++) {
	arr.push(i)                
}

Tests:

for
let i = 0 let len = arr.length let foundIndex = -1 for(;i<len;i++) { if (arr[i] > 999){ return i } }
prototype.find
const found = arr.find(function(element) { return element > 999 })
forEach
let foundForEachIndex = -1 arr.forEach(function (item){ if (item[i] > 999){ foundForEachIndex = i return } })
map
let foundMapIndex = arr.map(item => { if (item[i] > 999){ return i } })