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for vs foreach vs for..in vs for..of (let instead of var, and optimized for)
(version: 1)
Compare loop performance
Comparing performance of:
for vs foreach vs for in vs for..of
Created:
8 months ago
by:
Guest
Jump to the latest result
Script Preparation code:
const array = new Array(100);
Tests:
for
for (let i = 0, length = array.length; i < length; i++) { array[i]; }
foreach
array.forEach(function(i) { array[i]; });
for in
for (let i in array) { array[i]; }
for..of
for (let i of array) { array[i]; }
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (4)
Previous results
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Test case name
Result
for
foreach
for in
for..of
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
6 months ago
)
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/140.0.0.0 Safari/537.36
Browser/OS:
Chrome 140 on Windows
View result in a separate tab
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=618772" width="100%" height="500px"></iframe>
Test name
Executions per second
for
10133281.0 Ops/sec
foreach
11421719.0 Ops/sec
for in
9767712.0 Ops/sec
for..of
1440238.6 Ops/sec
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