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Run results for:
javascript loops (foreach, for-in, for-of, for, map, reduce) 1000 items
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=531977" 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/17.5 Safari/605.1.15
Browser:
Safari 17
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
2 years ago
for
10K/s
for-of
10K/s
optimized-for
10K/s
map
10K/s
reduce
10K/s
foreach
8K/s
for-in
7K/s
View exact numbers
Test name
Executions per second
✓
for
9,726 Ops/sec
for-of
9,669 Ops/sec
optimized-for
9,651 Ops/sec
map
9,584 Ops/sec
reduce
9,530 Ops/sec
foreach
7,991 Ops/sec
for-in
7,095 Ops/sec
Tests:
foreach
const items = Array.from({length: 1000}, () => Math.floor(Math.random() * 40)); let index = 0; items.forEach(i => index++);
for-in
const items = Array.from({length: 1000}, () => Math.floor(Math.random() * 40)); let index = 0; for (let i in items) { index++; }
for-of
const items = Array.from({length: 1000}, () => Math.floor(Math.random() * 40)); let index = 0; for (let i of items) { index++; }
for
const items = Array.from({length: 1000}, () => Math.floor(Math.random() * 40)); let index = 0; for(let i = 0; i < items.length; ++i) { index++; }
optimized-for
const items = Array.from({length: 1000}, () => Math.floor(Math.random() * 40)); let index = 0; for(let i = items.length; i > 0; --i) { index++; }
map
const items = Array.from({length: 1000}, () => Math.floor(Math.random() * 40)); items.map((_, i)=> i++);
reduce
const items = Array.from({length: 1000}, () => Math.floor(Math.random() * 40)); items.reduce((acc, curr)=> acc++, 0);