Run results for: Lodash cloneDeep vs structuredClone vs recursiveDeepCopy vs JSON clone with a simple and a more deep test

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36

Browser: Chrome 123

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
Lodash	202565.2 Ops/sec
structuredClone	99855.7 Ops/sec
recursiveDeepCopy	240751.9 Ops/sec
Json clone	152408.3 Ops/sec

HTML Preparation code:

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

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

Script Preparation code:

var MySimpleObject = {
    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 MyDeepObject = {
    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...',
        object: {
            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...',
                object: {
                    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...',
                        object: {
                            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...',
                                object: {
                                    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...',
                                        object: {
                                            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...',
                                                something: [0, 1, 2, 3, 3, 4, 4, 5, 5, 5, 3, 24, 234, 2, 34, 23, 4, 23, 4, 234],
                                            }
                                        }
                                    }
                                }
                            }
                        }
                    }
                }
            }
        }
    }
};

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;
}

​x
 
var MySimpleObject = {    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 MyDeepObject = {    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...',        object: {            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...',                object: {                    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...',                        object: {                            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...',                                object: {                                    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...',                                        object: {                                            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...',                                                something: [0, 1, 2, 3, 3, 4, 4, 5, 5, 5, 3, 24, 234, 2, 34, 23, 4, 23, 4, 234],                                            }                                        }                                    }                                }                            }                        }                    }                }            }        }    }};​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
myCopy = _.cloneDeep(MySimpleObject); myCopy = _.cloneDeep(MyDeepObject);
myCopy = _.cloneDeep(MySimpleObject);
myCopy = _.cloneDeep(MyDeepObject);
structuredClone
myCopy = structuredClone(MySimpleObject); myCopy = structuredClone(MyDeepObject);
myCopy = structuredClone(MySimpleObject);
myCopy = structuredClone(MyDeepObject);
recursiveDeepCopy
myCopy = recursiveDeepCopy(MySimpleObject); myCopy = recursiveDeepCopy(MyDeepObject);
myCopy = recursiveDeepCopy(MySimpleObject);
myCopy = recursiveDeepCopy(MyDeepObject);
Json clone
myCopy = JSON.parse(JSON.stringify(MySimpleObject)); myCopy = JSON.parse(JSON.stringify(MyDeepObject));
myCopy = JSON.parse(JSON.stringify(MySimpleObject));
myCopy = JSON.parse(JSON.stringify(MyDeepObject));

Run results for: Lodash cloneDeep vs structuredClone vs recursiveDeepCopy vs JSON clone with a simple and a more deep test

Lodash

structuredClone

recursiveDeepCopy

Json clone