Benchmark: Object cloning - MeasureThat.net

Script Preparation code:

obj =
  {
  	a: 'testing',
    b: 4,
    p: {
      value: 42,
      writable: true,
      enumerable: true,
      configurable: true,
    },
  }

Tests:

Spread
const clone = { ...obj }
Object.assign()
const clone = Object.assign({}, obj)
Object.create()
const clone = Object.create(obj)
Object.defineProperties();
let clone = {}; Object.defineProperties(clone, Object.getOwnPropertyDescriptors(obj));
Object.fromEntries(Object.entries())
const clone = Object.fromEntries(Object.entries(obj))
structuredClone()
const clone = structuredClone(obj)
JSON.parse()
const clone = JSON.parse(JSON.stringify(obj))

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Spread
Object.assign()
Object.create()
Object.defineProperties();
Object.fromEntries(Object.entries())
structuredClone()
JSON.parse()

Fastest: N/A

Slowest: N/A

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Latest run results:

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

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/112.0.0.0 Safari/537.36

Browser/OS: Chrome 112 on Windows

View result in a separate tab

Test name	Executions per second
Spread	7610545.0 Ops/sec
Object.assign()	3367596.0 Ops/sec
Object.create()	4355392.0 Ops/sec
Object.defineProperties();	545752.8 Ops/sec
Object.fromEntries(Object.entries())	803330.2 Ops/sec
structuredClone()	303250.5 Ops/sec
JSON.parse()	612547.3 Ops/sec

Object cloning (version: 0)

Comparing performance of: Spread vs Object.assign() vs Object.create() vs Object.defineProperties(); vs Object.fromEntries(Object.entries()) vs structuredClone() vs JSON.parse()

Created: one year ago by: Registered User

Jump to the latest result

Spread

Object.assign()

Object.create()

Object.defineProperties();

Object.fromEntries(Object.entries())

structuredClone()

JSON.parse()

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A