Benchmark: Lodash cloneDeep vs structuredClone vs recursiveDeepCopy vs JSON clone 10kb json

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...'
  },
  '10kbData': {"v":"4.8.0","meta":{"g":"LottieFiles AE 1.0.0","a":"","k":"","d":"","tc":""},"fr":24,"ip":0,"op":13,"w":1920,"h":1080,"nm":"Memory-Quote2-Land","ddd":0,"assets":[],"layers":[{"ddd":0,"ind":1,"ty":4,"nm":"Layer 7","sr":1,"ks":{"o":{"a":0,"k":100,"ix":11},"r":{"a":0,"k":-90,"ix":10},"p":{"a":0,"k":[1881.361,374.222,0],"ix":2},"a":{"a":0,"k":[-269.25,-364.002,0],"ix":1},"s":{"a":0,"k":[75,100,100],"ix":6}},"ao":0,"shapes":[{"ty":"gr","it":[{"ind":0,"ty":"sh","ix":1,"ks":{"a":1,"k":[{"t":0,"s":[{"i":[[0,0],[-45.968,15.004],[-103.629,-7.26],[-61.666,-72.221]],"o":[[36.695,-28.209],[97.244,-31.74],[103.629,7.26],[0,0]],"v":[[-336.636,52.976],[-208.147,-7.912],[96.474,-54.322],[336.636,55.716]],"c":true}],"h":1},{"t":4,"s":[{"i":[[0,0],[-45.968,15.004],[-103.629,-7.26],[-61.666,-72.221]],"o":[[36.695,-28.209],[97.244,-31.74],[103.629,7.26],[0,0]],"v":[[-336.636,52.976],[-214.147,-17.912],[104.474,-62.322],[360.636,65.716]],"c":true}],"h":1},{"t":8,"s":[{"i":[[0,0],[-45.968,15.004],[-103.629,-7.26],[-61.666,-72.221]],"o":[[36.695,-28.209],[97.244,-31.74],[103.629,7.26],[0,0]],"v":[[-326.636,58.976],[-214.147,-27.912],[118.474,-56.322],[368.636,67.716]],"c":true}],"h":1},{"t":12,"s":[{"i":[[0,0],[-45.968,15.004],[-103.629,-7.26],[-61.666,-72.221]],"o":[[36.695,-28.209],[97.244,-31.74],[103.629,7.26],[0,0]],"v":[[-326.636,58.976],[-198.147,-35.912],[148.474,-56.322],[368.636,67.716]],"c":true}],"h":1}],"ix":2,"x":"var $bm_rt;\n$bm_rt = valueAtTime($bm_mod(time, key(numKeys).time));"},"nm":"Path 1","mn":"ADBE Vector Shape - 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};

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);
Native structuredClone
myCopy = structuredClone(MyObject);
recursiveDeepCopy
myCopy = recursiveDeepCopy(MyObject);
Json Clone
myCopy = JSON.parse(JSON.stringify(MyObject));

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Lodash cloneDeep
Native structuredClone
recursiveDeepCopy
Json Clone

Fastest: N/A

Slowest: N/A

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/138.0.0.0 Safari/537.36

Browser/OS: Chrome 138 on Windows

View result in a separate tab

recursiveDeepCopy

39K/s

Json Clone

15K/s

Native structuredClone

10K/s

Lodash cloneDeep

5K/s

View exact numbers

Test name	Executions per second
✓ recursiveDeepCopy	39,015 Ops/sec
Json Clone	15,317 Ops/sec
Native structuredClone	10,121 Ops/sec
Lodash cloneDeep	5,176 Ops/sec

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):

LLMs can make mistakes. Check important info.

Lodash cloneDeep vs structuredClone vs recursiveDeepCopy vs JSON clone 10kb json (version: 0)

https://developer.mozilla.org/en-US/docs/Web/API/structuredClone

Comparing performance of: `Lodash cloneDeep vs Native structuredClone vs recursiveDeepCopy vs Json Clone`

Created: 4 years ago by: Registered User

Go to the latest result

Lodash cloneDeep

Native structuredClone

recursiveDeepCopy

Json Clone

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):

Lodash cloneDeep vs structuredClone vs recursiveDeepCopy vs JSON clone 10kb json (version: 0)

https://developer.mozilla.org/en-US/docs/Web/API/structuredClone

Comparing performance of: Lodash cloneDeep vs Native structuredClone vs recursiveDeepCopy vs Json Clone

Created: 4 years ago by: Registered User

Go to the latest result

Lodash cloneDeep

Native structuredClone

recursiveDeepCopy

Json Clone

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):

Related benchmarks

Comparing performance of: `Lodash cloneDeep vs Native structuredClone vs recursiveDeepCopy vs Json Clone`