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Run results for:
for vs foreach vs some vs for..of vs for in
Compare loop performance
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=539484" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/127.0.0.0 Safari/537.36
Browser:
Chrome 127
Operating system:
Windows
Device Platform:
Desktop
Date tested:
one year ago
foreach
1.6M/s
some
1.6M/s
for in
1.4M/s
for..of
29K/s
for
17K/s
View exact numbers
Test name
Executions per second
✓
foreach
1,569,914 Ops/sec
some
1,562,927 Ops/sec
for in
1,438,593 Ops/sec
for..of
28,632 Ops/sec
for
16,721 Ops/sec
Script Preparation code:
var array = new Array(1000);
Tests:
for
for (var i = 0; i < array.length; i++) { array[i]; }
foreach
array.forEach(function(i) { array[i]; });
some
array.some(function(i) { array[i]; });
for..of
for (var i of array) { array[i]; }
for in
for (var i in array) { array[i]; }