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Run results for:
Lodash chunk vs JS reduce
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Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:139.0) Gecko/20100101 Firefox/139.0
Browser:
Firefox 139
Operating system:
Mac OS X 10.15
Device Platform:
Desktop
Date tested:
11 months ago
Test name
Executions per second
Lodash
3716.0 Ops/sec
JS
1.0 Ops/sec
Chunk slice
54851.6 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 = Array.from({ length: 100000 }, () => Math.random())
Tests:
Lodash
const groups = _.chunk(arr,5000)
JS
const chunk = (input, size) => { return input.reduce((arr, item, idx) => { return idx % size === 0 ? [...arr, [item]] : [...arr.slice(0, -1), [...arr.slice(-1)[0], item]]; }, []); }; chunk(arr,5000);
Chunk slice
function chunk(arr, chunkSize) { if (chunkSize <= 0) { throw new Error("Chunk size has to be greater than 0."); } const chunks = []; for (let i = 0; i < arr.length; i = i + chunkSize) { chunks.push(arr.slice(i, i + chunkSize)); } return chunks; } chunk(arr,5000);