Run results for: Fors comparison

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36

Browser: Chrome 120

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

for...of

4K/s

forEach

3K/s

for

91/s

for.. in

59/s

View exact numbers

Script Preparation code:

var tab = [];
for (let i = 0; i < 100000; ++i) {
    tab.push({
        a: i.toString(),
        b: i
    });
}

Tests:

for
for(let i = 0; i < 100000; ++i) { tab[i].a = 'aaaaaaaaaaa'; tab[i].b = 0; }
for.. in
for(let index in tab) { tab[index].a = 'bbbbbbbbb'; tab[index].b = 0; }
for...of
for(let obj of tab) { obj.a = 'cccccccccc'; obj.b = 0; }
forEach
tab.forEach((obj) => { obj.a = 'dddddddd'; obj.b = 0; });