Benchmark: Lodash cloneDeep vs native cloneDeep (copy object)

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;
};

Tests:

Lodash cloneDeep
testCopy = _.cloneDeep(testObject);
Native map deep slice(turns objects into arrays)
testCopy = [testObject].map(arr => [testObject].slice());
Native JSON parse
testCopy = JSON.parse(JSON.stringify(testObject));
Native map deep slice at 0(turns objects into arrays)
testCopy = [testObject].map(arr => [testObject].slice(0));

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Lodash cloneDeep
Native map deep slice(turns objects into arrays)
Native JSON parse
Native map deep slice at 0(turns objects into arrays)

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 (X11; Ubuntu; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/112.0

Browser/OS: Firefox 112 on Ubuntu

View result in a separate tab

Test name	Executions per second
Lodash cloneDeep	556549.0 Ops/sec
Native map deep slice(turns objects into arrays)	9783496.0 Ops/sec
Native JSON parse	670029.0 Ops/sec
Native map deep slice at 0(turns objects into arrays)	9681889.0 Ops/sec

Lodash cloneDeep vs native cloneDeep (copy object) (version: 0)

compare array copy/clone methods

Comparing performance of: Lodash cloneDeep vs Native map deep slice(turns objects into arrays) vs Native JSON parse vs Native map deep slice at 0(turns objects into arrays)

Created: one year ago by: Guest

Jump to the latest result

Lodash cloneDeep

Native map deep slice(turns objects into arrays)

Native JSON parse

Native map deep slice at 0(turns objects into arrays)

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A