Benchmark: Lodash cloneDeep vs native cloneDeep (copy object5)

HTML Preparation code:

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

Script Preparation code:

var testArray = [{
  description: 'Random description.',
  testNumber: 123456789,
  testBoolean: true,
  testObject: {
    testString: 'test string',
    testNumber: 12345
  },
  testArray: [{
    myName: 'test name',
    myNumber: 123245
  }]
},{
  description: 'Random description.',
  testNumber: 123456789,
  testBoolean: true,
  testObject: {
    testString: 'test string',
    testNumber: 12345
  },
  testArray: [{
    myName: 'test name',
    myNumber: 123245
  }]
}];


var testObject = {
  description: 'Random description.',
  testNumber: 123456789,
  testBoolean: true,
  testObject: {
    testString: 'test string',
    testNumber: 12345
  }
};
var testCopy = null;

var deepClone = function(obj) {
   var out;
    if (Array.isArray(obj)) {
        out = [];
        for (var index = 0; index < obj.length; ++index) {
            let subArray = obj[index];
            out.push((subArray === null) ? subArray : (subArray instanceof Date) ? new Date(subArray.valueOf()) : (typeof subArray === 'object') ? deepClone(subArray) : subArray);
        }
    } else {
        out = {};
        for (var key in obj) {
            var subObject = obj[key];
            out[key] = subObject === null ? subObject : subObject instanceof Date ? new Date(subObject.valueOf()) : (typeof subObject === 'object') ? deepClone(subObject) : subObject;
            
           
        }
    }
    return out;
};

var clone = function(obj) {
  	let temp;
    if (obj === null || typeof (obj) !== 'object' || 'isActiveClone' in obj) {
        return obj;
    }

    if (obj instanceof Date) {
        let temp = new obj.constructor(); 
    }
    else {
        let temp = obj.constructor();
    }

    for (let key in obj) {
        if (Object.prototype.hasOwnProperty.call(obj, key)) {
            obj['isActiveClone'] = null;
            temp[key] = clone(obj[key]);
            delete obj['isActiveClone'];
        }
    }
    return temp;
}

var cloneWithKeys = function(obj) {
  	let temp;
    if (obj === null || typeof (obj) !== 'object' || 'isActiveClone' in obj) {
        return obj;
    }

    if (obj instanceof Date) {
        let temp = new obj.constructor(); 
    }
    else {
        let temp = obj.constructor();
    }

    Object.keys(obj).forEach(key => {
        //if (Object.prototype.hasOwnProperty.call(obj, key)) {
            obj['isActiveClone'] = null;
            temp[key] = clone(obj[key]);
            delete obj['isActiveClone'];
        //}
    })
    return temp;
}

Tests:

Lodash cloneDeep
testCopy = _.cloneDeep(testObject);
Deep Clone test
testCopy = deepClone(testObject)
Alt Clone
testCopy = clone(testObject)
Alt Clone Keys
testCopy = cloneWithKeys(testObject)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Lodash cloneDeep
Deep Clone test
Alt Clone
Alt Clone Keys

Fastest: N/A

Slowest: N/A

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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/112.0.0.0 Safari/537.36

Browser/OS: Chrome 112 on Windows

View result in a separate tab

Test name	Executions per second
Lodash cloneDeep	764722.2 Ops/sec
Deep Clone test	733419.9 Ops/sec
Alt Clone	0.0 Ops/sec
Alt Clone Keys	4913150.0 Ops/sec

Lodash cloneDeep vs native cloneDeep (copy object5) (version: 2)

compare array copy/clone methods

Comparing performance of: Lodash cloneDeep vs Deep Clone test vs Alt Clone vs Alt Clone Keys

Created: one year ago by: Registered User

Jump to the latest result

Lodash cloneDeep

Deep Clone test

Alt Clone

Alt Clone Keys

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A