Benchmark: Array.reduce vs for loop vs Array.forEach vs for of loop

Script Preparation code:

//Create an array of 1000 random intergers between 1 and 10000
var arrRandom = [];
for(var intCtr=0; intCtr<1000; intCtr++) {
  arrRandom.push(Math.floor(Math.random() * Math.floor(10000)));
}

function reduceCallback(accum, curr) {
	return accum+curr;
}

function doRedeuce(pArray) {
	return pArray.reduce(reduceCallback);
}
function doForLoop(pArray) {
	var accum = 0;
	var arrLength = pArray.length;
	for(var intCtr=0; intCtr<arrLength; intCtr++) {
		accum += pArray[intCtr];
	}
	return accum;
}
function doForOfLoop(pArray) {
	var accum = 0;
	for(var value of pArray) {
		accum += value;
	}
	return accum;
}
function doForEach(pArray) {
	var accum = 0;
	pArray.forEach(function(item) {
		accum += item;
	});
}

Tests:

Array.reduce
var redeuceResult=0; redeuceResult = doRedeuce(arrRandom);
for loop
var loopResult=0; loopResult = doForLoop(arrRandom);
Array.forEach
var forEachResult=0 forEachResult = doForEach(arrRandom)
for of loop
var forOfResult=0 forOfResult = doForOfLoop(arrRandom)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Array.reduce
for loop
Array.forEach
for of loop

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 9 months ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/115.0.0.0 Safari/537.36 Edg/115.0.1901.188

Browser/OS: Chrome 115 on Windows

View result in a separate tab

Test name	Executions per second
Array.reduce	96538.7 Ops/sec
for loop	757090.4 Ops/sec
Array.forEach	644713.8 Ops/sec
for of loop	588140.9 Ops/sec

Array.reduce vs for loop vs Array.forEach vs for of loop (version: 0)

A test summing 1000 random numbers, 1 - 10000

Comparing performance of: Array.reduce vs for loop vs Array.forEach vs for of loop

Created: 6 years ago by: Guest

Jump to the latest result

Array.reduce

for loop

Array.forEach

for of loop

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A