Benchmark: lodash immutable merge vs object.assign vs spread vs mix

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.15/lodash.min.js'></script>

Tests:

lodash immutable merge
var a = { a: 'oh', b: 'my' }; var b = { c: 'goddess' }; var c = _.merge({}, a, b);
immutable object.assign
var a = { a: 'oh', b: 'my' }; var b = { c: 'goddess' }; var c = Object.assign({}, a, b);
spread
var a = { a: 'oh', b: 'my' }; var b = { c: 'goddess' }; var c = { ...a, ...b };
mix
var a = { a: 'oh', b: 'my' }; var b = { c: 'goddess' }; var c = _.merge(Object.assign({}, a), b);

Rendered benchmark preparation results:

Previous results

Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36

Browser/OS: Chrome 120 on Windows

spread

46.0M/s

immutable object.assign

10.2M/s

lodash immutable merge

4.1M/s

mix

4.0M/s

View exact numbers

lodash immutable merge vs object.assign vs spread vs mix (version: 0) Benchmark.js