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Run results for:
for vs foreach vs for..of vs for..of over entries
Compare loop performance
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<iframe src="https://measurethat.net/Embed?id=534238" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:120.0) Gecko/20100101 Firefox/120.0
Browser:
Firefox 120
Operating system:
Mac OS X 10.15
Device Platform:
Desktop
Date tested:
2 years ago
for
3.4M/s
foreach
2.7M/s
for..of
1.2M/s
for..of over entries
495K/s
View exact numbers
Test name
Executions per second
✓
for
3,443,178 Ops/sec
foreach
2,702,950 Ops/sec
for..of
1,170,783 Ops/sec
for..of over entries
495,301 Ops/sec
Script Preparation code:
var array = Array.from({length: 100}); var t;
Tests:
for
for (let i = 0; i < array.length; i++) { t = array[i]; }
foreach
array.forEach(function(v, i) { t = v; });
for..of
for (var v of array) { t = v; }
for..of over entries
for (var [i, v] of array.entries()) { t = v; }