Benchmark: array.forEach() vs .reduce vs for of vs for

Script Preparation code:

var array = [];
for (var i = 0; i < 10000; i++) {
  array[i] = i;
}

var firstTestResults = [];
var secondTestResults = [];
var thirdTestResults = [];
var fourthTestResults = [];

Tests:

array.forEach()
array.forEach((v) => { let value = v + 10; if (value % 2 === 0) { firstTestResults.push(value); } });
array.reduce()
secondTestResults = array.reduce((acc, value) => { value = value + 10; if (value % 2 === 0) { acc.push(value); } return acc; }, []);
for of
for(val of array) { let value = val + 10; if (value % 2 === 0) { thirdTestResults.push(value); } }
for
for(let i = 0; i < array.length; i++){ let value = array[i] + 10; if (value % 2 === 0) { fourthTestResults.push(value); } }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
array.forEach()
array.reduce()
for of
for

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 3 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.0.1 Safari/605.1.15

Browser/OS: Safari 14 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
array.forEach()	1509.3 Ops/sec
array.reduce()	16405.0 Ops/sec
for of	201.9 Ops/sec
for	401.7 Ops/sec

array.forEach() vs .reduce vs for of vs for (version: 0)

Comparing performance of: array.forEach() vs array.reduce() vs for of vs for

Created: 3 years ago by: Guest

Jump to the latest result

array.forEach()

array.reduce()

for of

for

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A