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Run results for:
for vs foreach vs for..in vs for..of
Compare loop performance
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=594058" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:129.0) Gecko/20100101 Firefox/129.0
Browser:
Firefox 129
Operating system:
Windows
Device Platform:
Desktop
Date tested:
one year ago
for in
37.6M/s
for
10.2M/s
foreach
4.2M/s
for..of
704K/s
View exact numbers
Test name
Executions per second
✓
for in
37,618,484 Ops/sec
for
10,249,350 Ops/sec
foreach
4,210,702 Ops/sec
for..of
703,975 Ops/sec
Script Preparation code:
var array = new Array(100);
Tests:
for
for (var i = 0; i < array.length; i++) { array[i]; }
foreach
array.forEach(function(i) { array[i]; });
for in
for (var i in array) { array[i]; }
for..of
for (var i of array) { array[i]; }