Run results for: Lodash sumBy vs forEach vs for

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36

Browser: Chrome 123

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

foreach

5K/s

_.sumBy

2K/s

for

187/s

View exact numbers

Test name	Executions per second
✓ foreach	5,253 Ops/sec
_.sumBy	1,544 Ops/sec
for	187 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:

function getRandomInt(max) {
  return Math.floor(Math.random() * Math.floor(max));
}

var arr = [];
for(var i = 0; i < 100000; i++){
  arr.push({value:getRandomInt(100)});
}

Tests:

_.sumBy
_.sumBy(arr,"value");
foreach
let result = 0; arr.forEach(element => { result += element.value }); return result;
for
let result = 0; for(let i=0;i<arr.length;i++) { result += arr[i].value; }; return result;