Benchmark: Lodash cloneDeep vs structuredClone vs recursiveDeepCopy vs JSON clone vs Fast Copy vs chatGptDeepClone

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>
<script type="module">
  import fastCopy from 'https://cdn.skypack.dev/fast-copy';
  window.fastCopy = fastCopy;
</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);
Native structuredClone
myCopy = structuredClone(MyObject);
recursiveDeepCopy
myCopy = recursiveDeepCopy(MyObject);
Json Clone
myCopy = JSON.parse(JSON.stringify(MyObject));
Fast Copy
myCopy = fastCopy(MyObject);
chatGptDeepClone
function chatGptDeepClone(obj) { if (obj === null || typeof obj !== 'object') { return obj; } let clone = Array.isArray(obj) ? [] : {}; for (let key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { clone[key] = chatGptDeepClone(obj[key]); } } return clone; } myCopy = chatGptDeepClone(MyObject);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Lodash cloneDeep
Native structuredClone
recursiveDeepCopy
Json Clone
Fast Copy
chatGptDeepClone

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 11 months ago)

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36

Browser/OS: Chrome 114 on Linux

View result in a separate tab

Test name	Executions per second
Lodash cloneDeep	656363.9 Ops/sec
Native structuredClone	266193.1 Ops/sec
recursiveDeepCopy	905176.3 Ops/sec
Json Clone	403752.7 Ops/sec
Fast Copy	1110313.0 Ops/sec
chatGptDeepClone	609482.2 Ops/sec

Lodash cloneDeep vs structuredClone vs recursiveDeepCopy vs JSON clone vs Fast Copy vs chatGptDeepClone (version: 0)

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

Created: 11 months ago by: Registered User

Jump to the latest result

Lodash cloneDeep

Native structuredClone

recursiveDeepCopy

Json Clone

Fast Copy

chatGptDeepClone

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A