Benchmark: for vs foreach vs for..in vs for..of (updated)

Script Preparation code:

const array = new Array(100);

Tests:

for
const LENGTH = array.length; for (let i = 0; i < LENGTH; i++) { array[i] = Math.random(); }
foreach
array.forEach(function(i) { array[i] = Math.random(); });
for in
for (let i in array) { array[i] = Math.random(); }
for..of
for (let i of array) { array[i] = Math.random(); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

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

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 8 months ago)

User agent: Mozilla/5.0 (Windows NT 10.0; rv:109.0) Gecko/20100101 Firefox/115.0

Browser/OS: Firefox 115 on Windows

View result in a separate tab

for

779K/s

for in

36K/s

for..of

24K/s

foreach

24K/s

View exact numbers

Test name	Executions per second
✓ for	778,741 Ops/sec
for in	35,754 Ops/sec
for..of	24,240 Ops/sec
foreach	23,552 Ops/sec

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

Compare loop performance

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

Created: one year ago by: Guest

Go to the latest result

for

foreach

for in

for..of

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

Compare loop performance

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

Created: one year ago by: Guest

Go to the latest result

for

foreach

for in

for..of

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`