Benchmark Run Result for: lodash merge vs object.assign vs spread 1

Test name	Executions per second
lodash merge	307380.8 Ops/sec
object.assign	2835799.2 Ops/sec
spread	2574295.0 Ops/sec

lodash merge

var a = {
    "_id": "66fbb8cedd880f8726d3430d",
    "index": 0,
    "guid": "0a9b7fd8-2e1c-423e-9129-a4b34edd6ea0",
    "isActive": false,
    "balance": "$3,498.70",
    "picture": "http://placehold.it/32x32",
    "age": 31,
    "eyeColor": "blue",
    "name": "Estrada Mcfarland",
    "gender": "male",
    "company": "BULLZONE",
    "email": "estradamcfarland@bullzone.com",
    "phone": "+1 (875) 565-3286",
    "address": "344 Oakland Place, Caledonia, Ohio, 8843",
    "about": "Cupidatat velit minim Lorem quis non. Ullamco magna qui commodo aliquip cillum anim ea aliqua. Tempor ullamco nulla cillum mollit veniam tempor ipsum ipsum culpa ipsum. Quis sit velit minim ad eiusmod veniam aliquip non anim veniam anim enim est cupidatat. Pariatur ipsum ipsum commodo irure laborum qui velit do est ullamco. Tempor velit ullamco Lorem non laboris culpa ullamco excepteur aliquip laboris cillum occaecat adipisicing anim.\r\n",
    "registered": "2014-01-31T12:10:19 -07:00",
    "latitude": 37.048423,
    "longitude": 131.714333,
    "tags": [
      "reprehenderit",
      "ea",
      "esse",
      "ipsum",
      "Lorem",
      "dolor",
      "non"
    ],
    "friends": [
      {
        "id": 0,
        "name": "Bender Battle"
      },
      {
        "id": 1,
        "name": "Flowers Huff"
      },
      {
        "id": 2,
        "name": "Amanda Armstrong"
      }]};
var b = {
    "_id": "66fbb8fb871c6f25070b297b",
    "index": 0,
    "guid": "65f9bf15-96b5-4e1c-8d17-a7b9f9f52cf3",
    "isActive": false,
    "balance": "$2,098.99",
    "picture": "http://placehold.it/32x32",
    "age": 39,
    "eyeColor": "blue",
    "name": "Cherry Hendrix",
    "gender": "female",
    "company": "MAGNINA",
    "email": "cherryhendrix@magnina.com",
    "phone": "+1 (842) 469-3783",
    "address": "645 Myrtle Avenue, Sharon, Nevada, 4405",
    "about": "Consequat Lorem Lorem quis ea mollit Lorem deserunt eiusmod elit. Eu est duis in incididunt exercitation consequat duis sint quis adipisicing nisi. Quis sunt excepteur laborum cillum cillum ea ullamco tempor duis esse eiusmod laboris. Velit aliquip consequat ullamco laboris laboris sit cillum commodo fugiat labore sint cillum consequat.\r\n",
    "registered": "2023-06-02T08:28:00 -07:00",
    "latitude": -67.322848,
    "longitude": 19.323204,
    "tags": [
      "amet",
      "laboris",
      "cillum",
      "irure",
      "velit",
      "officia",
      "in"
    ],
    "friends": [
      {
        "id": 0,
        "name": "Shanna Shelton"
      },
      {
        "id": 1,
        "name": "Lucile Kelley"
      },
      {
        "id": 2,
        "name": "Walker Hall"
      }
    ],
    "greeting": "Hello, Cherry Hendrix! You have 3 unread messages.",
    "favoriteFruit": "apple"
  };
var c = _.merge(a, b);

object.assign

var a = {
    "_id": "66fbb8cedd880f8726d3430d",
    "index": 0,
    "guid": "0a9b7fd8-2e1c-423e-9129-a4b34edd6ea0",
    "isActive": false,
    "balance": "$3,498.70",
    "picture": "http://placehold.it/32x32",
    "age": 31,
    "eyeColor": "blue",
    "name": "Estrada Mcfarland",
    "gender": "male",
    "company": "BULLZONE",
    "email": "estradamcfarland@bullzone.com",
    "phone": "+1 (875) 565-3286",
    "address": "344 Oakland Place, Caledonia, Ohio, 8843",
    "about": "Cupidatat velit minim Lorem quis non. Ullamco magna qui commodo aliquip cillum anim ea aliqua. Tempor ullamco nulla cillum mollit veniam tempor ipsum ipsum culpa ipsum. Quis sit velit minim ad eiusmod veniam aliquip non anim veniam anim enim est cupidatat. Pariatur ipsum ipsum commodo irure laborum qui velit do est ullamco. Tempor velit ullamco Lorem non laboris culpa ullamco excepteur aliquip laboris cillum occaecat adipisicing anim.\r\n",
    "registered": "2014-01-31T12:10:19 -07:00",
    "latitude": 37.048423,
    "longitude": 131.714333,
    "tags": [
      "reprehenderit",
      "ea",
      "esse",
      "ipsum",
      "Lorem",
      "dolor",
      "non"
    ],
    "friends": [
      {
        "id": 0,
        "name": "Bender Battle"
      },
      {
        "id": 1,
        "name": "Flowers Huff"
      },
      {
        "id": 2,
        "name": "Amanda Armstrong"
      }]};
var b = {
    "_id": "66fbb8fb871c6f25070b297b",
    "index": 0,
    "guid": "65f9bf15-96b5-4e1c-8d17-a7b9f9f52cf3",
    "isActive": false,
    "balance": "$2,098.99",
    "picture": "http://placehold.it/32x32",
    "age": 39,
    "eyeColor": "blue",
    "name": "Cherry Hendrix",
    "gender": "female",
    "company": "MAGNINA",
    "email": "cherryhendrix@magnina.com",
    "phone": "+1 (842) 469-3783",
    "address": "645 Myrtle Avenue, Sharon, Nevada, 4405",
    "about": "Consequat Lorem Lorem quis ea mollit Lorem deserunt eiusmod elit. Eu est duis in incididunt exercitation consequat duis sint quis adipisicing nisi. Quis sunt excepteur laborum cillum cillum ea ullamco tempor duis esse eiusmod laboris. Velit aliquip consequat ullamco laboris laboris sit cillum commodo fugiat labore sint cillum consequat.\r\n",
    "registered": "2023-06-02T08:28:00 -07:00",
    "latitude": -67.322848,
    "longitude": 19.323204,
    "tags": [
      "amet",
      "laboris",
      "cillum",
      "irure",
      "velit",
      "officia",
      "in"
    ],
    "friends": [
      {
        "id": 0,
        "name": "Shanna Shelton"
      },
      {
        "id": 1,
        "name": "Lucile Kelley"
      },
      {
        "id": 2,
        "name": "Walker Hall"
      }
    ],
    "greeting": "Hello, Cherry Hendrix! You have 3 unread messages.",
    "favoriteFruit": "apple"
  };
var c = Object.assign(a, b);

spread

var a = {
    "_id": "66fbb8cedd880f8726d3430d",
    "index": 0,
    "guid": "0a9b7fd8-2e1c-423e-9129-a4b34edd6ea0",
    "isActive": false,
    "balance": "$3,498.70",
    "picture": "http://placehold.it/32x32",
    "age": 31,
    "eyeColor": "blue",
    "name": "Estrada Mcfarland",
    "gender": "male",
    "company": "BULLZONE",
    "email": "estradamcfarland@bullzone.com",
    "phone": "+1 (875) 565-3286",
    "address": "344 Oakland Place, Caledonia, Ohio, 8843",
    "about": "Cupidatat velit minim Lorem quis non. Ullamco magna qui commodo aliquip cillum anim ea aliqua. Tempor ullamco nulla cillum mollit veniam tempor ipsum ipsum culpa ipsum. Quis sit velit minim ad eiusmod veniam aliquip non anim veniam anim enim est cupidatat. Pariatur ipsum ipsum commodo irure laborum qui velit do est ullamco. Tempor velit ullamco Lorem non laboris culpa ullamco excepteur aliquip laboris cillum occaecat adipisicing anim.\r\n",
    "registered": "2014-01-31T12:10:19 -07:00",
    "latitude": 37.048423,
    "longitude": 131.714333,
    "tags": [
      "reprehenderit",
      "ea",
      "esse",
      "ipsum",
      "Lorem",
      "dolor",
      "non"
    ],
    "friends": [
      {
        "id": 0,
        "name": "Bender Battle"
      },
      {
        "id": 1,
        "name": "Flowers Huff"
      },
      {
        "id": 2,
        "name": "Amanda Armstrong"
      }]};
var b = {
    "_id": "66fbb8fb871c6f25070b297b",
    "index": 0,
    "guid": "65f9bf15-96b5-4e1c-8d17-a7b9f9f52cf3",
    "isActive": false,
    "balance": "$2,098.99",
    "picture": "http://placehold.it/32x32",
    "age": 39,
    "eyeColor": "blue",
    "name": "Cherry Hendrix",
    "gender": "female",
    "company": "MAGNINA",
    "email": "cherryhendrix@magnina.com",
    "phone": "+1 (842) 469-3783",
    "address": "645 Myrtle Avenue, Sharon, Nevada, 4405",
    "about": "Consequat Lorem Lorem quis ea mollit Lorem deserunt eiusmod elit. Eu est duis in incididunt exercitation consequat duis sint quis adipisicing nisi. Quis sunt excepteur laborum cillum cillum ea ullamco tempor duis esse eiusmod laboris. Velit aliquip consequat ullamco laboris laboris sit cillum commodo fugiat labore sint cillum consequat.\r\n",
    "registered": "2023-06-02T08:28:00 -07:00",
    "latitude": -67.322848,
    "longitude": 19.323204,
    "tags": [
      "amet",
      "laboris",
      "cillum",
      "irure",
      "velit",
      "officia",
      "in"
    ],
    "friends": [
      {
        "id": 0,
        "name": "Shanna Shelton"
      },
      {
        "id": 1,
        "name": "Lucile Kelley"
      },
      {
        "id": 2,
        "name": "Walker Hall"
      }
    ],
    "greeting": "Hello, Cherry Hendrix! You have 3 unread messages.",
    "favoriteFruit": "apple"
  };
var c = { ...a, ...b };

lodash merge vs object.assign vs spread 1

Date tested: 6 months ago

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.0.0 Safari/537.36

Benchmark definition (click to collapse):

lodash merge

object.assign

spread