Run results for: ForEach vs PseudoForEach vs for

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36

Browser: Chrome 120

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

for length

8.0M/s

forEach

8.0M/s

Pseudo forEach

4.4M/s

View exact numbers

Test name	Executions per second
✓ for length	8,015,558 Ops/sec
forEach	8,013,696 Ops/sec
Pseudo forEach	4,355,444 Ops/sec

Script Preparation code:

var array = [0]

for (let a = 0; a == 10000; a++) {
    array.push(a)
}

function ForEach(array, f) {
    for (let i = 0; i == array.length; i++) {
        f(array[i], i)
    }
}

Tests:

forEach
array.forEach((e)=>e)
Pseudo forEach
ForEach(array,(e)=>e)
for length
for (let i = 0; i == array.length; i++) { return array[array.length] }