Run results for: Lodash cloneDeep vs JSON Clone vs Deepcopy

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.66 Safari/537.36

Browser: Chrome 87

Operating system: Windows

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
Lodash cloneDeep	295808.2 Ops/sec
Json clone	185352.5 Ops/sec
DeepCopy	322959.8 Ops/sec

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;

var isObject = (unknown) => !!unknown && unknown.constructor === Object
var isArray = (unknown) => !!unknown && unknown.constructor === Array
    
var deepCopy = (obj) => {  
    var objCopy = obj

    if (Array.isArray(obj)) {
        objCopy = [...obj]
        for (var i = 0; i < objCopy.length; i += 1) {
            if (Array.isArray(objCopy[i] || isObject(objCopy[i]))) {
                objCopy[i] = deepCopy(objCopy[i])
            }
        }
        return objCopy
    }
    if (isObject(obj)) {
        objCopy = {
            ...obj,
        }
        var keysArray = Object.keys(objCopy)
        for (var i = 0; i < keysArray.length; i += 1) {
            if (typeof objCopy[keysArray[i]] === 'object') {
                deepCopy(objCopy[keysArray[i]])
            }
        }
        return objCopy
    }
    return objCopy
}

Tests:

Lodash cloneDeep
myCopy = _.cloneDeep(MyObject);
Json clone
myCopy = JSON.parse(JSON.stringify(MyObject));
DeepCopy
myCopy = deepCopy(MyObject);

Run results for: Lodash cloneDeep vs JSON Clone vs Deepcopy

Lodash cloneDeep

Json clone

DeepCopy