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

Test name	Executions per second
✓ recursiveDeepCopy	93,394 Ops/sec
Lodash	71,180 Ops/sec
Json clone	58,494 Ops/sec
structuredClone	44,231 Ops/sec
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;
}
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
