Benchmark: 3 different for loops vs foreach() vs some() vs for..of

Script Preparation code:

var array = new Array(100);

Tests:

for (dynamic length)
var i = 0; for (; i < array.length; ++i) { array[i]; }
foreach
array.forEach(function(i) { array[i]; });
some
array.some(function(i) { array[i]; });
for..of
for (var i of array) { array[i]; }
for (static length)
var len = array.length var i = 0; for (; i < len; ++i) { array[i]; }
backward for
var i = array.length - 1 for (; i >= 0; --i) { array[i]; }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
for (dynamic length)
foreach
some
for..of
for (static length)
backward for

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 5 months ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/145.0.0.0 Safari/537.36 Edg/145.0.0.0

Browser/OS: Chrome 145 on Windows

View result in a separate tab

some

7.5M/s

foreach

7.3M/s

backward for

6.2M/s

for (static length)

5.5M/s

for (dynamic length)

4.1M/s

for..of

895K/s

View exact numbers

Test name	Executions per second
✓ some	7,500,228 Ops/sec
foreach	7,270,996 Ops/sec
backward for	6,185,748 Ops/sec
for (static length)	5,537,069 Ops/sec
for (dynamic length)	4,099,466 Ops/sec
for..of	895,189 Ops/sec

3 different for loops vs foreach() vs some() vs for..of (version: 1)

Compare loop performance

Comparing performance of: `for (dynamic length) vs foreach vs some vs for..of vs for (static length) vs backward for`

Created: 11 months ago by: Guest

Go to the latest result

for (dynamic length)

foreach

some

for..of

for (static length)

backward for

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

3 different for loops vs foreach() vs some() vs for..of (version: 1)

Compare loop performance

Comparing performance of: for (dynamic length) vs foreach vs some vs for..of vs for (static length) vs backward for

Created: 11 months ago by: Guest

Go to the latest result

for (dynamic length)

foreach

some

for..of

for (static length)

backward for

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Related benchmarks

Comparing performance of: `for (dynamic length) vs foreach vs some vs for..of vs for (static length) vs backward for`