Run results for: Array.flat vs (reduce + concat) vs (reduce + destructure) vs (reduce + push) vs lodash.flatten vs destructuring 2

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36

Browser: Chrome 123

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

lodash.flatten

2.7M/s

destructuring

2.1M/s

Array.flat

1.9M/s

reduce + push

988K/s

reduce + concat

907K/s

reduce + destructure

840K/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, {}], 5, [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) => Array.isArray(curr) ? [...acc, ...curr] : [...acc, curr] , []);
reduce + push
params.reduce((acc, curr) => { Array.isArray(curr) ? acc.push(...curr) : acc.push(curr); return acc; }, []);
lodash.flatten
_.flatten(params)
destructuring
[ ...params[0], ...params[1], params[2], ...params[3], params[4], ...params[5], ...params[6] ]