Run results for: Array.reduce vs for loop vs Array.forEach v2

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/73.0.3683.86 Safari/537.36

Browser: Chrome 73

Operating system: Mac OS X 10.14.3

Device Platform: Desktop

Date tested: 5 years ago

Test name	Executions per second
reduce	1543616.0 Ops/sec
for loop	1497629.0 Ops/sec
forEach	562311.6 Ops/sec

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

Tests:

reduce
var redeuceResult=0; redeuceResult = doRedeuce(arrRandom);
for loop
var loopResult=0; loopResult = doLoop(arrRandom);
forEach
var forEachResult=0 forEachResult = doForEach(arrRandom)

Run results for: Array.reduce vs for loop vs Array.forEach v2

A test summing 1000 random numbers, 1 - 10000

reduce

for loop

forEach