Benchmark: Object.assign vs for in vs Object.entries+for of vs spread

Script Preparation code:

var obj = {
  officeIpAddresses: [],
  customDomainHasUpdatedDns: false,
  stylePermissions: {
    styleAccess: {
      block: true,
      text: true,
      css: true,
      toolbar: true,
      motion: true,
    },
    editStyle: false,
  },
  permissions: {
    userInvitePermission: "test",
    defaultProjectAccess: "none",
  },
  notifications: {
    subscriptions: [],
    projectFirstOpen: true,
  },
  modules: {
    quote: {
    },
  },
};

Tests:

Object.assign
let newObj = Object.assign({}, obj)
for in
let newObj = {} for(let key in obj) { newObj[key] = obj[key] }
Object.keys + for of
let newObj = {} for(let key of Object.keys(obj)) { newObj[key] = obj[key] }
spread
let newObj = {...obj}

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Object.assign
for in
Object.keys + for of
spread

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 3 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4186.0 Safari/537.36

Browser/OS: Chrome 86 on Mac OS X 10.15.5

View result in a separate tab

Test name	Executions per second
Object.assign	2743575.0 Ops/sec
for in	1399892.0 Ops/sec
Object.keys + for of	1195639.0 Ops/sec
spread	12144460.0 Ops/sec

Object.assign vs for in vs Object.entries+for of vs spread (version: 1)

Comparing performance of: Object.assign vs for in vs Object.keys + for of vs spread

Created: 3 years ago by: Registered User

Jump to the latest result

Object.assign

for in

Object.keys + for of

spread

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A