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

Run details:

User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:74.0) Gecko/20100101 Firefox/74.0

Browser: Firefox 74

Operating system: Ubuntu

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
lodash assign with inplace object creation	3674652.0 Ops/sec
object.assign	4366035.5 Ops/sec
spread	2101695.8 Ops/sec
lodash assign with object creation before	3814207.8 Ops/sec

HTML Preparation code:

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

Tests:

lodash assign with inplace object creation
var a = { a: 'oh', b: 'my' }; var c = _.assign(a, { c: 'goddess' });
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 };
lodash assign with object creation before
var a = { a: 'oh', b: 'my' }; var b = { c: 'goddess' }; var c = _.assign(a, b);