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Run results for:
for w/length constant vs foreach vs some vs for..of
Compare loop performance
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<iframe src="https://measurethat.net/Embed?id=490812" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36
Browser:
Chrome 120
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
2 years ago
foreach with operation
4.0M/s
some
3.9M/s
for
281K/s
for..of
223K/s
View exact numbers
Test name
Executions per second
✓
foreach with operation
4,025,164 Ops/sec
some
3,850,560 Ops/sec
for
281,467 Ops/sec
for..of
223,372 Ops/sec
Script Preparation code:
var array = new Array(100);
Tests:
for
const length = array.length for (var i = 0; i < length; i++) { array[i]; }
foreach with operation
array.forEach(function(i) { array[i]; });
some
array.some(function(i) { array[i]; });
for..of
for (var i of array) { array[i]; }