Benchmark: 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)
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
Stringify

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 17 days ago)

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36

Browser/OS: Chrome 124 on Linux

View result in a separate tab

Test name	Executions per second
Lodash clone	1301123.0 Ops/sec
Lodash cloneDeep	203163.7 Ops/sec
Lodash merge	127884.8 Ops/sec
ES6 spread	9458707.0 Ops/sec
ES6 Object.assign	3201333.0 Ops/sec
Stringify	423298.7 Ops/sec

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 Stringify

Created: 2 years ago by: Guest

Jump to the latest result

Lodash clone

Lodash cloneDeep

Lodash merge

ES6 spread

ES6 Object.assign

Stringify

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A