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Run results for:
for-in vs foreach vs for-of
Compare loop performance
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=561179" 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/130.0.0.0 Safari/537.36
Browser:
Chrome 130
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
one year ago
for-of
22.1M/s
foreach
9.2M/s
for-in
220K/s
View exact numbers
Test name
Executions per second
✓
for-of
22,089,778 Ops/sec
foreach
9,153,500 Ops/sec
for-in
219,625 Ops/sec
Script Preparation code:
var array = new Array(100);
Tests:
for-in
for (var i = 0; i < array.length; ++i) { array[i]; }
foreach
array.forEach((item) => { item; });
for-of
for (const item of array) { item; }