Run results for: lodash merge vs object.assign vs spread

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 12_0 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) FxiOS/12.2b11231 Mobile/16A5339e Safari/605.1.15

Browser: Mobile Safari 12

Operating system: iOS 12.0

Device Platform: Mobile

Date tested: 5 years ago

Test name	Executions per second
lodash merge	1620840.0 Ops/sec
object.assign	2118727.0 Ops/sec
spread	656225.8 Ops/sec

HTML Preparation code:

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

Tests:

lodash merge
var a = { a: 'oh', b: 'my' }; var b = { c: 'goddess' }; var c = _.merge(a, b);
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 };