Run results for: array.forEach() vs .reduce vs for of vs for

Run details:

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: Safari 14

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 3 years ago

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

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); } }

Run results for: array.forEach() vs .reduce vs for of vs for

array.forEach()

array.reduce()

for of

for