Benchmark: for vs foreach vs for..in vs for..of sum

Script Preparation code:

var array = new Array(100).fill(1);

Tests:

for
let sum = 0; for (let i = 0; i < array.length; i++) { sum += array[i]; }
foreach
let sum = 0; array.forEach(value => { sum += value; });
for in
let sum = 0; for (let i in array) { sum += array[i]; }
for..of
let sum = 0; for (let value of array) { sum += value; }
cached for
let sum = 0, len = array.length; for (let i = 0; i < len; i++) { sum += array[i]; }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
for
foreach
for in
for..of
cached for

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/132.0.0.0 YaBrowser/25.2.0.0 Safari/537.36

Browser/OS: Yandex Browser 25 on Windows

View result in a separate tab

for..of

12.1M/s

cached for

6.9M/s

foreach

6.7M/s

for

4.8M/s

for in

541K/s

View exact numbers

Test name	Executions per second
✓ for..of	12,056,550 Ops/sec
cached for	6,856,606 Ops/sec
foreach	6,698,160 Ops/sec
for	4,783,004 Ops/sec
for in	541,492 Ops/sec

for vs foreach vs for..in vs for..of sum (version: 1)

Compare loop performance

Comparing performance of: `for vs foreach vs for in vs for..of vs cached for`

Created: one year ago by: Guest

Go to the latest result

for

foreach

for in

for..of

cached for

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

for vs foreach vs for..in vs for..of sum (version: 1)

Compare loop performance

Comparing performance of: for vs foreach vs for in vs for..of vs cached for

Created: one year ago by: Guest

Go to the latest result

for

foreach

for in

for..of

cached for

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Related benchmarks

Comparing performance of: `for vs foreach vs for in vs for..of vs cached for`