Benchmark: Array.reduce vs for loops vs Array.forEach

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 doRedeuce(pArray) {
	return pArray.reduce(function(accum, curr) {
	    return accum+curr;
    });
}
function forLoop(pArray) {
	var accum = 0;
	for(var intCtr=0; intCtr<pArray.length; intCtr++) {
		accum += pArray[intCtr];
	}
	return accum;
}
function forOfLoop(pArray) {
	var accum = 0;
	for (var item of pArray) {
		accum += item;
	}
	return accum;
}
function doForEach(pArray) {
	var accum = 0;
	pArray.forEach(function(item) {
		accum += item;
	});
}

Tests:

reduce
var redeuceResult=0; redeuceResult = doRedeuce(arrRandom);
for loop
var loopResult=0; loopResult = forLoop(arrRandom);
forEach
var forEachResult=0 forEachResult = doForEach(arrRandom)
for-of loop
var loopResult=0; loopResult = forOfLoop(arrRandom);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
reduce
for loop
forEach
for-of loop

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Mobile Safari/537.36

Browser/OS: Chrome Mobile 130 on Android

View result in a separate tab

for-of loop

681K/s

forEach

554K/s

for loop

491K/s

reduce

269K/s

View exact numbers

Test name	Executions per second
✓ for-of loop	681,251 Ops/sec
forEach	553,999 Ops/sec
for loop	490,774 Ops/sec
reduce	268,514 Ops/sec

Array.reduce vs for loops vs Array.forEach (version: 0)

A test summing 1000 random numbers, 1 - 10000

Comparing performance of: `reduce vs for loop vs forEach vs for-of loop`

Created: 5 years ago by: Guest

Go to the latest result

reduce

for loop

forEach

for-of loop

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Array.reduce vs for loops vs Array.forEach (version: 0)

A test summing 1000 random numbers, 1 - 10000

Comparing performance of: reduce vs for loop vs forEach vs for-of loop

Created: 5 years ago by: Guest

Go to the latest result

reduce

for loop

forEach

for-of loop

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Related benchmarks

Comparing performance of: `reduce vs for loop vs forEach vs for-of loop`