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Run results for:
javascript loops with setup code
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=613849" 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/18.5 Safari/605.1.15
Browser:
Safari 18
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
one year ago
foreach
667K/s
for-of
560K/s
optimized-for
332K/s
for
236K/s
for-in
36K/s
View exact numbers
Test name
Executions per second
✓
foreach
667,168 Ops/sec
for-of
559,808 Ops/sec
optimized-for
331,771 Ops/sec
for
235,967 Ops/sec
for-in
36,418 Ops/sec
Script Preparation code:
const items = Array.from({length: 1000}, () => Math.floor(Math.random() * 40)); const itemsLength = items.length; let index = 0;
Tests:
foreach
items.forEach(i => index++);
for-in
for (let i in items) { index++; }
for-of
for (let i of items) { index++; }
for
for(let i = 0; i < items.length; ++i) { index++; }
optimized-for
for(let i = itemsLength; i > 0; --i) { index++; }