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

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))

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Lodash clone
Lodash cloneDeep
Lodash merge
ES6 spread
ES6 Object.assign
JSON.parse(JSON.stringify())

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: one month ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36

Browser/OS: Chrome 123 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
Lodash clone	3964580.0 Ops/sec
Lodash cloneDeep	556442.7 Ops/sec
Lodash merge	396427.3 Ops/sec
ES6 spread	22596820.0 Ops/sec
ES6 Object.assign	8411806.0 Ops/sec
JSON.parse(JSON.stringify())	1060006.0 Ops/sec

Object cloning with Lodash clone vs cloneDeep vs merge vs ES6 object spread vs ES6 Object.assign vs JSON.parse(JSON.stringify()) (version: 0)

Comparing performance of: Lodash clone vs Lodash cloneDeep vs Lodash merge vs ES6 spread vs ES6 Object.assign vs JSON.parse(JSON.stringify())

Created: 4 years ago by: Guest

Jump to the latest result

Lodash clone

Lodash cloneDeep

Lodash merge

ES6 spread

ES6 Object.assign

JSON.parse(JSON.stringify())

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A