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For x for in x for of x forEach
(version: 0)
Comparing performance of:
forEach vs for vs for in
Created:
7 years ago
by:
Guest
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Script Preparation code:
var arr = []; for (var i = 0; i < 1000; i++) { arr[i] = i; } function someFn(i) { return i * 3 * 8; }
Tests:
forEach
arr.forEach(function (item){ someFn(item); })
for
for (var i = 0, len = arr.length; i < len; i++) { someFn(arr[i]); }
for in
for (var i in arr) { someFn(i); }
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
Previous results
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Test case name
Result
forEach
for
for in
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
25 days ago
)
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/146.0.0.0 YaBrowser/26.4.0.0 Safari/537.36
Browser/OS:
Yandex Browser 26 on Windows
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<iframe src="https://measurethat.net/Embed?id=629144" width="100%" height="500px"></iframe>
Test name
Executions per second
forEach
1489987.5 Ops/sec
for
411390.0 Ops/sec
for in
58068.9 Ops/sec
Related benchmarks:
Array loop vs foreach vs map vs for w/o fn call - with console.log
Array loop: forEach vs for vs map vs for of entries
For loop test #1
Array loop vs foreach vs map e
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