Benchmark: lodash clonedeep vs json.parse(stringify()) vs recursivecopy vs structuredClone

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

Script Preparation code:

var MyObject = {
  description: 'Creates a deep copy of source, which should be an object or an array.',
  myNumber: 123456789,
  myBoolean: true,
  jayson: {
    stringify: 'JSON.stringify() method converts a JavaScript value to a JSON string....',
    parse: 'JSON.parse() method parses a JSON string...'
  }
};

var myCopy = null;

function recursiveDeepCopy(o) {
    var newO,
      i;
  
    if (typeof o !== 'object') {
      return o;
    }
    if (!o) {
      return o;
    }
  
    if ('[object Array]' === Object.prototype.toString.apply(o)) {
      newO = [];
      for (i = 0; i < o.length; i += 1) {
        newO[i] = recursiveDeepCopy(o[i]);
      }
      return newO;
    }
  
    newO = {};
    for (i in o) {
      if (o.hasOwnProperty(i)) {
        newO[i] = recursiveDeepCopy(o[i]);
      }
    }
    return newO;
  }

Tests:

Lodash CloneDeep
myCopy = _.cloneDeep(MyObject);
Json Clone
myCopy = JSON.parse(JSON.stringify(MyObject));
recursiveDeepCopy
myCopy = recursiveDeepCopy(MyObject);
structuredClone
myCopy = structuredClone(MyObject)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Lodash CloneDeep
Json Clone
recursiveDeepCopy
structuredClone

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/132.0.0.0 Safari/537.36

Browser/OS: Chrome 132 on Linux

View result in a separate tab

recursiveDeepCopy

2.2M/s

Lodash CloneDeep

616K/s

Json Clone

524K/s

structuredClone

243K/s

View exact numbers

Test name	Executions per second
✓ recursiveDeepCopy	2,202,011 Ops/sec
Lodash CloneDeep	616,432 Ops/sec
Json Clone	524,355 Ops/sec
structuredClone	242,811 Ops/sec

lodash clonedeep vs json.parse(stringify()) vs recursivecopy vs structuredClone (version: 1)

Comparing performance of: `Lodash CloneDeep vs Json Clone vs recursiveDeepCopy vs structuredClone`

Created: one year ago by: Guest

Go to the latest result

Lodash CloneDeep

Json Clone

recursiveDeepCopy

structuredClone

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

lodash clonedeep vs json.parse(stringify()) vs recursivecopy vs structuredClone (version: 1)

Comparing performance of: Lodash CloneDeep vs Json Clone vs recursiveDeepCopy vs structuredClone

Created: one year ago by: Guest

Go to the latest result

Lodash CloneDeep

Json Clone

recursiveDeepCopy

structuredClone

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Related benchmarks

Comparing performance of: `Lodash CloneDeep vs Json Clone vs recursiveDeepCopy vs structuredClone`