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Run results for:
for vs foreach vs for..of vs for..of over entries (const) etc
Compare loop performance
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<iframe src="https://measurethat.net/Embed?id=499268" 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/17.0 Safari/605.1.15
Browser:
Safari 17
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
2 years ago
foreach
159K/s
for..of
112K/s
for..of over entries
70K/s
for
69K/s
View exact numbers
Test name
Executions per second
✓
foreach
159,209 Ops/sec
for..of
111,776 Ops/sec
for..of over entries
70,083 Ops/sec
for
69,256 Ops/sec
Script Preparation code:
var array = Array.from({length: 100}); var t; var s = new Set()
Tests:
for
for (let i = 0; i < array.length; i++) { s.add(array[i]) }
foreach
array.forEach(function(v, i) { s.add(v) });
for..of
for (const v of array) { s.add(v) }
for..of over entries
for (const [i, v] of array.entries()) { s.add(v) }