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Run results for:
for vs foreach vs some vs every vs for..of vs map
Compare loop performance
Go to the benchmark
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=495861" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:121.0) Gecko/20100101 Firefox/121.0
Browser:
Firefox 121
Operating system:
Windows
Device Platform:
Desktop
Date tested:
2 years ago
Benchmark engine:
Benchmark.js
for
7.1M/s
some
4.5M/s
every
4.3M/s
foreach
3.9M/s
map
2.1M/s
for..of
606K/s
View exact numbers
Test name
Executions per second
✓
for
7,148,802 Ops/sec
some
4,498,502 Ops/sec
every
4,316,874 Ops/sec
foreach
3,872,129 Ops/sec
map
2,054,392 Ops/sec
for..of
606,241 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]; });
some
array.some(function(i) { array[i]; });
every
array.every(function(i) { array[i]; });
for..of
for (var i of array) { array[i]; }
map
array.map(a => a);