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

lodash.merge is NOT equivalent to object.assign, it does much more work so obviously it's slower tbh though lodash.assign is probably just a wrapper for object.assign for all I know

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 13_1_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) FxiOS/19.1b16203 Mobile/15E148 Safari/605.1.15

Browser: Mobile Safari 13

Operating system: iOS 13.1.2

Device Platform: Mobile

Date tested: 5 years ago

Test name	Executions per second
lodash assign	3880079.5 Ops/sec
object.assign	6014277.5 Ops/sec
spread	1445973.5 Ops/sec

HTML Preparation code:

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

Tests:

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

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

lodash.merge is NOT equivalent to object.assign, it does much more work so obviously it's slower tbh though lodash.assign is probably just a wrapper for object.assign for all I know

lodash assign

object.assign

spread