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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=587309" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:135.0) Gecko/20100101 Firefox/135.0
Browser:
Firefox 135
Operating system:
Windows
Device Platform:
Desktop
Date tested:
one year ago
for
9.5M/s
foreach
7.1M/s
for..of
2.0M/s
for..of over entries
1.1M/s
View exact numbers
Test name
Executions per second
✓
for
9,549,323 Ops/sec
foreach
7,142,392 Ops/sec
for..of
1,984,539 Ops/sec
for..of over entries
1,144,830 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; }