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javascript loops 10000000 items
(version: 1)
Comparing performance of:
foreach vs for-in vs for-of vs for vs optimized-for
Created:
one year ago
by:
Guest
Go to the latest result
Tests:
foreach
const items = Array.from({length: 10000000}, () => Math.floor(Math.random() * 40)); let index = 0; items.forEach(i => index++);
for-in
const items = Array.from({length: 10000000}, () => Math.floor(Math.random() * 40)); let index = 0; for (let i in items) { index++; }
for-of
const items = Array.from({length: 10000000}, () => Math.floor(Math.random() * 40)); let index = 0; for (let i of items) { index++; }
for
const items = Array.from({length: 10000000}, () => Math.floor(Math.random() * 40)); let index = 0; for(let i = 0; i < items.length; ++i) { index++; }
optimized-for
const items = Array.from({length: 10000000}, () => Math.floor(Math.random() * 40)); let index = 0; for(let i = items.length; i > 0; --i) { index++; }
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (5)
Previous results
Fork
Test case name
Result
foreach
for-in
for-of
for
optimized-for
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
one year ago
)
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36
Browser/OS:
Chrome 130 on Mac OS X 10.15.7
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=564774" width="100%" height="500px"></iframe>
for
1/s
optimized-for
1/s
for-of
1/s
foreach
1/s
for-in
1/s
View exact numbers
Test name
Executions per second
✓
for
1 Ops/sec
optimized-for
1 Ops/sec
for-of
1 Ops/sec
foreach
1 Ops/sec
for-in
1 Ops/sec
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