Run results for: forEach vs reduce vs map vs filter vs for3

Run details:

User agent: Mozilla/5.0 (Linux; Android 9; SM-J530F) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.162 Mobile Safari/537.36

Browser: Chrome Mobile 80

Operating system: Android

Device Platform: Mobile

Date tested: 4 years ago

Test name	Executions per second
forEach	37.1 Ops/sec
reduce	99.6 Ops/sec
map	29.8 Ops/sec
filter	30.7 Ops/sec
for	31.8 Ops/sec

Script Preparation code:

var arr = [];
for (var i = 0; i < 12345; i++) {
  arr[i] = i;
}

function someFn(i) {
  return (i * 3 * 8 / 1200 * 0.002 / 40 * 0.2);
}

var sumForEach = 0,
  sumReduce = 0,
  sumMap = 0,
  sumFilter = 0,
  sumFor = 0;

Tests:

forEach
arr.forEach(item => sumForEach += someFn(item)); return sumForEach;
reduce
return arr.reduce((lastValue, item) => { return lastValue += someFn(item); }, 0);
map
arr.map(item => (sumMap += someFn(item))); return sumMap;
filter
arr.filter(item => (sumFilter += someFn(item))); return sumFilter;
for
for (var j = 0; j < arr.length; j++) { sumFor += arr[j]; } return sumFor;