Toggle navigation
MeasureThat
.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
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
Go to the latest result
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
Fork
Test case name
Result
forEach
for
for in
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
2 months 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
View result in a separate tab
Embed
Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=629144" width="100%" height="500px"></iframe>
forEach
1.5M/s
for
411K/s
for in
58K/s
View exact numbers
Test name
Executions per second
✓
forEach
1,489,988 Ops/sec
for
411,390 Ops/sec
for in
58,069 Ops/sec
Related benchmarks
Array loop: forEach vs for vs map vs for of entries
Comments
Confirm delete:
Do you really want to delete benchmark?