Run results for: Object cloning with Lodash clone vs cloneDeep vs merge vs ES6 object spread vs ES6 Object.assign

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 17_2_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.2 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 17

Operating system: iOS 17.2.1

Device Platform: Mobile

Date tested: 2 years ago

ES6 spread

4.6M/s

ES6 Object.assign

3.5M/s

Lodash clone

2.1M/s

Lodash cloneDeep

206K/s

Lodash merge

141K/s

View exact numbers

Test name	Executions per second
✓ ES6 spread	4,618,199 Ops/sec
ES6 Object.assign	3,483,487 Ops/sec
Lodash clone	2,091,446 Ops/sec
Lodash cloneDeep	206,138 Ops/sec
Lodash merge	140,690 Ops/sec

HTML Preparation code:

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

Script Preparation code:

var o = {
 a: {
   b: 1,
   c: 2,
   d: 3,
   j: {
     k: [1,2,3],
     l: [4,5,6]
   },
 },
 e: [1,2,3,4,5,6],
 f: 1,
 g: {
   h: 1,
 }
}

Tests:

Lodash clone
const a = _.clone(o)
Lodash cloneDeep
const a = _.cloneDeep(o)
Lodash merge
const a = _.merge({}, o)
ES6 spread
const a = { ...o }
ES6 Object.assign
const a = Object.assign({}, o)