Run results for: lodash map vs filter vs reduce vs for each

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/77.0.3865.90 Safari/537.36

Browser: Chrome 77

Operating system: Mac OS X 10.14.3

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
map	279.2 Ops/sec
filter	252.9 Ops/sec
foreach	268.8 Ops/sec
reduce	270.7 Ops/sec

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

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:

map
_.map(arr, (item) => sumMap += someFn(item));
filter
_.filter(arr, (item) => (sumFilter += someFn(item)));
foreach
_.forEach(arr, (item) => sumForEach += someFn(item));
reduce
_.reduce(arr, (lastValue, item) => { return sumReduce += someFn(item); });

Run results for: lodash map vs filter vs reduce vs for each

map

filter

foreach

reduce