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Run results for:
sum vs sumBy vs reduce
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Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/136.0.0.0 Safari/537.36
Browser:
Chrome 136
Operating system:
Windows
Device Platform:
Desktop
Date tested:
one year ago
Test name
Executions per second
sum
1611667.1 Ops/sec
sumBy
2074764.4 Ops/sec
lodash sum
240733.4 Ops/sec
lodash sumBy
16108488.0 Ops/sec
HTML Preparation code:
<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.21/lodash.min.js'></script>
Script Preparation code:
const smallArray = Array.from({ length: 1000 }, (_, i) => i); // Identity function const identity = (x) => x; // sum using reduce const sum = (arr) => arr.reduce((acc, curr) => acc + curr, 0); // sumBy using reduce with a function const sumBy = (fn, arr) => arr.reduce((acc, item) => acc + fn(item), 0);
Tests:
sum
sum(smallArray)
sumBy
sumBy(identity, smallArray)
lodash sum
_.sum(smallArray)
lodash sumBy
_.sumBy(identity, smallArray)