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Run results for:
for vs forEach vs some vs for..of vs for..in
Compare loop performance
Go to the benchmark
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=593738" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.36
Browser:
Chrome 134
Operating system:
Linux
Device Platform:
Desktop
Date tested:
one year ago
Benchmark engine:
Benchmark.js
for..of
3.7M/s
foreach
3.7M/s
some
1.8M/s
for
966K/s
for..in
61K/s
View exact numbers
Test name
Executions per second
✓
for..of
3,725,722 Ops/sec
foreach
3,683,489 Ops/sec
some
1,826,720 Ops/sec
for
965,847 Ops/sec
for..in
60,997 Ops/sec
Script Preparation code:
var array = new Array(1000).fill(0);
Tests:
for
for (let i = 0, length = array.length; i < length; i++) { array[i] }
foreach
array.forEach(item => item);
some
array.some(item => item);
for..of
for (let item of array) { item }
for..in
for (let i in array) { array[i] }