Run results for: Lodash sumBy vs map and reduce

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:61.0) Gecko/20100101 Firefox/61.0 ql66u54b

Browser: Firefox 61

Operating system: Windows

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
_.sumBy	1770.7 Ops/sec
map and reduce	524.7 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:

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");
map and reduce
arr.map(item => item.value).reduce((prev, next) => prev + next);

Run results for: Lodash sumBy vs map and reduce

_.sumBy

map and reduce