Run results for: JSON.stringify vs structuredClone (7 KB JSON)

Run details:
User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/127.0.0.0 Safari/537.36 Edg/127.0.0.0
Browser: Chrome 127
Operating system: Windows
Device Platform: Desktop
Date tested: 2 months ago
Test name	Executions per second
JSON.stringify	58018.7 Ops/sec
structuredClone	33595.5 Ops/sec
Script Preparation code:
var MyObject = {
  "testJSON": [
  {
    "id": 0,
    "name": "Elijah",
    "city": "Austin",
    "age": 78,
    "friends": [
      {
        "name": "Michelle",
        "hobbies": [
          "Watching Sports",
          "Reading",
          "Skiing & Snowboarding"
        ]
      },
      {
        "name": "Robert",
        "hobbies": [
          "Traveling",
          "Video Games"
        ]
      }
    ]
  },
  {
    "id": 1,
    "name": "Noah",
    "city": "Boston",
    "age": 97,
    "friends": [
      {
        "name": "Oliver",
        "hobbies": [
          "Watching Sports",
          "Skiing & Snowboarding",
          "Collecting"
        ]
      },
      {
        "name": "Olivia",
        "hobbies": [
          "Running",
          "Music",
          "Woodworking"
        ]
      },
      {
        "name": "Robert",
        "hobbies": [
          "Woodworking",
          "Calligraphy",
          "Genealogy"
        ]
      },
      {
        "name": "Ava",
        "hobbies": [
          "Walking",
          "Church Activities"
        ]
      },
      {
        "name": "Michael",
        "hobbies": [
          "Music",
          "Church Activities"
        ]
      },
      {
        "name": "Michael",
        "hobbies": [
          "Martial Arts",
          "Painting",
          "Jewelry Making"
        ]
      }
    ]
  },
  {
    "id": 2,
    "name": "Evy",
    "city": "San Diego",
    "age": 48,
    "friends": [
      {
        "name": "Joe",
        "hobbies": [
          "Reading",
          "Volunteer Work"
        ]
      },
      {
        "name": "Joe",
        "hobbies": [
          "Genealogy",
          "Golf"
        ]
      },
      {
        "name": "Oliver",
        "hobbies": [
          "Collecting",
          "Writing",
          "Bicycling"
        ]
      },
      {
        "name": "Liam",
        "hobbies": [
          "Church Activities",
          "Jewelry Making"
        ]
      },
      {
        "name": "Amelia",
        "hobbies": [
          "Calligraphy",
          "Dancing"
        ]
      }
    ]
  },
  {
    "id": 3,
    "name": "Oliver",
    "city": "St. Louis",
    "age": 39,
    "friends": [
      {
        "name": "Mateo",
        "hobbies": [
          "Watching Sports",
          "Gardening"
        ]
      },
      {
        "name": "Nora",
        "hobbies": [
          "Traveling",
          "Team Sports"
        ]
      },
      {
        "name": "Ava",
        "hobbies": [
          "Church Activities",
          "Running"
        ]
      },
      {
        "name": "Amelia",
        "hobbies": [
          "Gardening",
          "Board Games",
          "Watching Sports"
        ]
      },
      {
        "name": "Leo",
        "hobbies": [
          "Martial Arts",
          "Video Games",
          "Reading"
        ]
      }
    ]
  },
  {
    "id": 4,
    "name": "Michael",
    "city": "St. Louis",
    "age": 95,
    "friends": [
      {
        "name": "Mateo",
        "hobbies": [
          "Movie Watching",
          "Collecting"
        ]
      },
      {
        "name": "Chris",
        "hobbies": [
          "Housework",
          "Bicycling",
          "Collecting"
        ]
      }
    ]
  },
  {
    "id": 5,
    "name": "Michael",
    "city": "Portland",
    "age": 19,
    "friends": [
      {
        "name": "Jack",
        "hobbies": [
          "Painting",
          "Television"
        ]
      },
      {
        "name": "Oliver",
        "hobbies": [
          "Walking",
          "Watching Sports",
          "Movie Watching"
        ]
      },
      {
        "name": "Charlotte",
        "hobbies": [
          "Podcasts",
          "Jewelry Making"
        ]
      },
      {
        "name": "Elijah",
        "hobbies": [
          "Eating Out",
          "Painting"
        ]
      }
    ]
  },
  {
    "id": 6,
    "name": "Lucas",
    "city": "Austin",
    "age": 76,
    "friends": [
      {
        "name": "John",
        "hobbies": [
          "Genealogy",
          "Cooking"
        ]
      },
      {
        "name": "John",
        "hobbies": [
          "Socializing",
          "Yoga"
        ]
      }
    ]
  },
  {
    "id": 7,
    "name": "Michelle",
    "city": "San Antonio",
    "age": 25,
    "friends": [
      {
        "name": "Jack",
        "hobbies": [
          "Music",
          "Golf"
        ]
      },
      {
        "name": "Daniel",
        "hobbies": [
          "Socializing",
          "Housework",
          "Walking"
        ]
      },
      {
        "name": "Robert",
        "hobbies": [
          "Collecting",
          "Walking"
        ]
      },
      {
        "name": "Nora",
        "hobbies": [
          "Painting",
          "Church Activities"
        ]
      },
      {
        "name": "Mia",
        "hobbies": [
          "Running",
          "Painting"
        ]
      }
    ]
  },
  {
    "id": 8,
    "name": "Emily",
    "city": "Austin",
    "age": 61,
    "friends": [
      {
        "name": "Nora",
        "hobbies": [
          "Bicycling",
          "Skiing & Snowboarding",
          "Watching Sports"
        ]
      },
      {
        "name": "Ava",
        "hobbies": [
          "Writing",
          "Reading",
          "Collecting"
        ]
      },
      {
        "name": "Amelia",
        "hobbies": [
          "Eating Out",
          "Watching Sports"
        ]
      },
      {
        "name": "Daniel",
        "hobbies": [
          "Skiing & Snowboarding",
          "Martial Arts",
          "Writing"
        ]
      },
      {
        "name": "Zoey",
        "hobbies": [
          "Board Games",
          "Tennis"
        ]
      }
    ]
  },
  {
    "id": 9,
    "name": "Liam",
    "city": "New Orleans",
    "age": 33,
    "friends": [
      {
        "name": "Chloe",
        "hobbies": [
          "Traveling",
          "Bicycling",
          "Shopping"
        ]
      },
      {
        "name": "Evy",
        "hobbies": [
          "Eating Out",
          "Watching Sports"
        ]
      },
      {
        "name": "Grace",
        "hobbies": [
          "Jewelry Making",
          "Yoga",
          "Podcasts"
        ]
      }
    ]
  }
]
}

var myCopy = null;
Tests:
JSON.stringify
myCopy = JSON.parse(JSON.stringify(MyObject));
structuredClone
myCopy = structuredClone(MyObject);