Run results for: Lodash sumBy (value and map) vs reduce

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:122.0) Gecko/20100101 Firefox/122.0

Browser: Firefox 122

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

_.sumBy with map

2K/s

map and reduce

2K/s

_.sumBy value

1K/s

View exact numbers

Test name	Executions per second
✓ _.sumBy with map	2,451 Ops/sec
map and reduce	2,388 Ops/sec
_.sumBy value	1,496 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 value
_.sumBy(arr, "value");
map and reduce
arr.reduce((prev, next) => prev + next.value, 0);
_.sumBy with map
_.sumBy(arr, x => x.value);