Benchmark: for vs foreach vs for..in vs for..of (small array)

Script Preparation code:

var array = new Array(1);

Tests:

for
for (var i = 0; i < array.length; i++) { array[i]; }
foreach
array.forEach(function(i) { array[i]; });
for in
for (var i in array) { array[i]; }
for..of
for (var i of array) { array[i]; }
for (cache length
const length = array.length for (var i = 0; i < length; i++) { array[i]; }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
for
foreach
for in
for..of
for (cache length

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (X11; CrOS x86_64 14541.0.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/132.0.0.0 Safari/537.36

Browser/OS: Chrome 132 on Chrome OS 14541.0.0

View result in a separate tab

for (cache length

16.2M/s

for

15.4M/s

foreach

14.5M/s

for..of

9.3M/s

for in

3.3M/s

View exact numbers

Test name	Executions per second
✓ for (cache length	16,183,961 Ops/sec
for	15,428,524 Ops/sec
foreach	14,520,560 Ops/sec
for..of	9,296,124 Ops/sec
for in	3,287,516 Ops/sec

for vs foreach vs for..in vs for..of (small array) (version: 1)

Compare loop performance

Comparing performance of: `for vs foreach vs for in vs for..of vs for (cache length`

Created: one year ago by: Guest

Go to the latest result

for

foreach

for in

for..of

for (cache length

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

for vs foreach vs for..in vs for..of (small array) (version: 1)

Compare loop performance

Comparing performance of: for vs foreach vs for in vs for..of vs for (cache length

Created: one year ago by: Guest

Go to the latest result

for

foreach

for in

for..of

for (cache length

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 for (cache length`