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Run results for:
for vs foreach vs for..of vs for..of over entries with big number of elements
Compare loop performance
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<iframe src="https://measurethat.net/Embed?id=566984" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.1 Safari/605.1.15
Browser:
Safari 18
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
one year ago
for..of
3K/s
foreach
3K/s
for..of over entries
3K/s
for
2K/s
View exact numbers
Test name
Executions per second
✓
for..of
2,901 Ops/sec
foreach
2,888 Ops/sec
for..of over entries
2,524 Ops/sec
for
1,568 Ops/sec
Script Preparation code:
var array = Array.from({length: 5000}); var t;
Tests:
for
var len = array.length; for (let i = 0; i < len; 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; }