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Run results for:
for vs foreach vs for..in vs for..of v2
Compare loop performance
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=526797" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0.0.0 Safari/537.36
Browser:
Chrome 125
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
2 years ago
for..of
144K/s
foreach
143K/s
for in
122K/s
for
92K/s
View exact numbers
Test name
Executions per second
✓
for..of
143,797 Ops/sec
foreach
143,147 Ops/sec
for in
121,996 Ops/sec
for
92,037 Ops/sec
Script Preparation code:
var array = new Array(100).fill(1); let counter = 0; var doStuff = (value) => counter += value;
Tests:
for
for (let i = 0; i < array.length; i++) { doStuff(array[i]); }
foreach
array.forEach((i) => { doStuff(array[i]); });
for in
for (const i in array) { doStuff(array[i]); }
for..of
for (const i of array) { doStuff(array[i]); }