Run results for: lodash flatten vs array.flat

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.110 Safari/537.36

Browser: Chrome 96

Operating system: Windows

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
spread	137419.5 Ops/sec
lodash flatten	169444.9 Ops/sec

HTML Preparation code:


<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

Tests:

spread
const arrayA = ['hi', 'hi', 'hi', 'hi']; const arrayB = ['hi', 'hi', 'hi', 'hi']; const flattened = [ arrayA, arrayB ].flat(); console.log(flattened);
lodash flatten
const arrayA = ['hi', 'hi', 'hi', 'hi']; const arrayB = ['hi', 'hi', 'hi', 'hi']; const flattened = []; const sourceObject = [ arrayA, arrayB ]; sourceObject.forEach((array) => { flattened.push(array) }); _.flatten(flattened); console.log(flattened);