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

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, start) {
	return pArray.reduce(function(accum, curr) { return accum + curr; }, start);
}
function doRedeuceArrowFunc(pArray, start) {
	return pArray.reduce((accum, curr) => accum + curr, start);
}
function doLoop(pArray) {
	var accum = 0;
	for(var intCtr=0; intCtr<pArray.length; intCtr++) {
		accum += pArray[intCtr];
	}
	return accum;
}
function doForEach(pArray) {
	var accum = 0;
	pArray.forEach((item) => {
		accum += item;
	});
}

Tests:

reduce (arrow function)
var reduceResult=0; redeuceResult = doRedeuceArrowFunc(arrRandom, 0);
for loop
var loopResult=0; loopResult = doLoop(arrRandom);
forEach
var forEachResult=0 forEachResult = doForEach(arrRandom)
reduce
var reduceResult=0; redeuceResult = doRedeuce(arrRandom, 0);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
reduce (arrow function)
for loop
forEach
reduce

Fastest: N/A

Slowest: N/A

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Latest run results:

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

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.96 Safari/537.36

Browser/OS: Chrome 58 on Windows

View result in a separate tab

Test name	Executions per second
reduce (arrow function)	52034.0 Ops/sec
for loop	563353.3 Ops/sec
forEach	55494.8 Ops/sec
reduce	52068.4 Ops/sec

Array.reduce vs for loop vs Array.forEach experiments (version: 3)

A test summing 1000 random numbers, 1 - 10000

Comparing performance of: reduce (arrow function) vs for loop vs forEach vs reduce

Created: 5 years ago by: Registered User

Jump to the latest result

reduce (arrow function)

for loop

forEach

reduce

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A