Run results for: Object cloning with Lodash clone vs cloneDeep vs merge vs ES6 object spread vs ES6 Object.assign vs JSON.parse(JSON.stringify())

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:81.0) Gecko/20100101 Firefox/81.0

Browser: Firefox 81

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
Lodash clone	2563919.8 Ops/sec
Lodash cloneDeep	157832.0 Ops/sec
Lodash merge	114801.0 Ops/sec
ES6 spread	5722720.0 Ops/sec
ES6 Object.assign	3744132.5 Ops/sec
JSON.parse(JSON.stringify())	390901.2 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)
JSON.parse(JSON.stringify())
const a = JSON.parse(JSON.stringify(o))

Run results for: Object cloning with Lodash clone vs cloneDeep vs merge vs ES6 object spread vs ES6 Object.assign vs JSON.parse(JSON.stringify())

Lodash clone

Lodash cloneDeep

Lodash merge

ES6 spread

ES6 Object.assign

JSON.parse(JSON.stringify())