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Run results for:
for vs for backwards vs for each vs some vs for..of
Compare loop performance
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=619077" 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/141.0.0.0 Safari/537.36
Browser:
Chrome 141
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
9 months ago
foreach
11.3M/s
some
11.1M/s
for
9.6M/s
for backwards
9.4M/s
for..of
1.8M/s
View exact numbers
Test name
Executions per second
✓
foreach
11,342,826 Ops/sec
some
11,053,922 Ops/sec
for
9,581,017 Ops/sec
for backwards
9,403,799 Ops/sec
for..of
1,818,913 Ops/sec
Script Preparation code:
var array = new Array(100);
Tests:
for
const len = array.length; for (var i = 0; i < len; 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 backwards
for (var i = array.length; i >= 0; i--) { array[i]; }