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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=519572" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (iPhone; CPU iPhone OS 16_6 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.6 Mobile/15E148 Safari/604.1
Browser:
Mobile Safari 16
Operating system:
iOS 16.6
Device Platform:
Mobile
Date tested:
2 years ago
for in
2.8M/s
foreach
219K/s
for..of
87K/s
for
79K/s
View exact numbers
Test name
Executions per second
✓
for in
2,758,074 Ops/sec
foreach
218,940 Ops/sec
for..of
87,185 Ops/sec
for
78,840 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]; }