Run results for: map vs forEach vs for loop

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.132 Safari/537.36

Browser: Chrome 80

Operating system: Mac OS X 10.15.3

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
reduce	962801.2 Ops/sec
forEach	3563.5 Ops/sec
for loop	2493.7 Ops/sec

Script Preparation code:

var arrRandom = [];
var reduceResult = forEachResult = forLoopResult = 0;
for(var intCtr=0; intCtr<1000; intCtr++) {
  arrRandom.push(Math.floor(Math.random() * Math.floor(100)));
}

Tests:

reduce
reduceResult = arrRandom.reduce(function(accum, curr) {return accum+curr});
forEach
arrRandom.forEach(function (item) { return forEachResult += item;})
for loop
for(var intCtr=0; intCtr<arrRandom.length; intCtr++) { forLoopResult += arrRandom[intCtr] }

Run results for: map vs forEach vs for loop

A test summing 1000 random numbers

reduce

forEach

for loop