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Run results for:
foreach vs for vs for in
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=599260" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:138.0) Gecko/20100101 Firefox/138.0
Browser:
Firefox 138
Operating system:
Windows
Device Platform:
Desktop
Date tested:
one year ago
for
636.4M/s
forEach
468K/s
for in
26K/s
View exact numbers
Test name
Executions per second
✓
for
636,445,312 Ops/sec
forEach
468,467 Ops/sec
for in
25,957 Ops/sec
Script Preparation code:
var a = Array(400).fill(0) var i = 0;
Tests:
forEach
a.forEach(d=>++i);
for
for (; i < a.length;) {const d=a[i];++i}
for in
for(const key in a){++i;}