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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=539572" 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
for in
883K/s
foreach
650K/s
some
490K/s
for..of
19K/s
for
8K/s
View exact numbers
Test name
Executions per second
✓
for in
882,759 Ops/sec
foreach
649,765 Ops/sec
some
489,626 Ops/sec
for..of
18,541 Ops/sec
for
8,073 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]; }