Run results for: Array.flat vs (reduce + concat) vs (reduce + destructure) vs (reduce + push) vs lodash.flatten vs destructuring

Run details:

User agent: Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Mobile Safari/537.36

Browser: Chrome Mobile 120

Operating system: Android

Device Platform: Mobile

Date tested: 2 years ago

reduce + push

3.0M/s

reduce + destructure

1.6M/s

destructuring

1.5M/s

lodash.flatten

1.5M/s

reduce + concat

1.0M/s

Array.flat

331K/s

View exact numbers

HTML Preparation code:

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

Script Preparation code:

var params = [[1, 2], ["hello", true, 7], [null, undefined, {}], [1, 2, 3, 4, 5], [false, true, {}, {}, {}]];

Tests:

Array.flat
params.flat();
reduce + concat
params.reduce((acc, val) => acc.concat(val), []);
reduce + destructure
params.reduce((acc, curr) => [...acc, ...curr], []);
reduce + push
params.reduce((acc, curr) => (acc.push(...curr), acc), []);
lodash.flatten
_.flatten(params)
destructuring
[ ...params[0], ...params[1], ...params[2], ...params[3], ...params[4] ]