Run results for: lodash chunk vs splice

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/138.0.0.0 Safari/537.36

Browser: Chrome 138

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Benchmark engine: Benchmark.js

chunk

5.2M/s

splice

4.7M/s

View exact numbers

Test name	Executions per second
✓ chunk	5,248,120 Ops/sec
splice	4,656,998 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 data = [{
  type: 'aaa',
  data: [1, 2, 3, 4, 5, 6, 7],
}, {
  type: 'bbb',
  data: ['a', 'b', 'c', 'd', 'e', 'f', 'g'],
}];

Tests:

chunk
var chunkTableConfig = (conf, grade) => { const chunkLength = Math.ceil(conf[0].data.length / grade); return conf.reduce((acc, cur, curI) => { const chunkedData = _.chunk(cur.data, chunkLength); acc.forEach((_el, elI) => { acc[elI][curI] = {...cur, data: chunkedData[elI]}; }); return acc; }, new Array(grade).fill(null).map(_ => [])); }; chunkTableConfig(data, 2);
splice
var chunkTableConfig = (conf, grade) => { const chunkLength = Math.ceil(conf[0].data.length / grade); return conf.reduce((acc, cur, curI) => { const shallowCopy = [...cur.data]; acc.forEach((_el, elI) => { acc[elI][curI] = {...cur, data: shallowCopy.splice(0, chunkLength)}; }); return acc; }, new Array(grade).fill(null).map(_ => [])); }; chunkTableConfig(data, 2);