Run results for: lodash merge vs lodash assign vs object.assign vs spread - 3 Levels

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/73.0.3683.103 Safari/537.36

Browser: Chrome 73

Operating system: Mac OS X 10.14.4

Device Platform: Desktop

Date tested: 5 years ago

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.11/lodash.min.js'></script>

Tests:

lodash merge
var a = { a: 'oh', b: 'my', d: { x: 1, z: { a: 'a' } } }; var b = { c: 'goddess', d: { x: 2, y: 99, z: { a: 'b' } } }; var c = _.merge(a, b);
lodash assign
var a = { a: 'oh', b: 'my', d: { x: 1, z: { a: 'a' } } }; var b = { c: 'goddess', d: { x: 2, y: 99, z: { a: 'b' } } }; var c = _.assign(a, b);
spread
var a = { a: 'oh', b: 'my', d: { x: 1, z: { a: 'a' } } }; var b = { c: 'goddess', d: { x: 2, y: 99, z: { a: 'b' } } }; var c = { ...a, ...b };
assign
var a = { a: 'oh', b: 'my', d: { x: 1, z: { a: 'a' } } }; var b = { c: 'goddess', d: { x: 2, y: 99, z: { a: 'b' } } }; var c = Object.assign({}, a, b);