Run results for: lodash clonedeep vs json.parse(stringify()) vs recursivecopy vs structured clone

Test name	Executions per second
✓ recursiveDeepCopy	2,759,553 Ops/sec
Json Clone	515,959 Ops/sec
structured clone	376,813 Ops/sec
Lodash CloneDeep	327,484 Ops/sec

Test name

Executions per second

✓ recursiveDeepCopy

2,759,553 Ops/sec

Json Clone

515,959 Ops/sec

structured clone

376,813 Ops/sec

Lodash CloneDeep

327,484 Ops/sec

Script Preparation code:

var MyObject = {
    description: 'Creates a deep copy of source, which should be an object or an array.',
    myNumber: 123456789,
    myBoolean: true,
    array: [{
            jayson: {
                stringify: 'JSON.stringify() method converts a JavaScript value to a JSON string....',
                parse: 'JSON.parse() method parses a JSON string...'
            }
        },
        {
            jayson: {
                stringify: 'JSON.stringify() method converts a JavaScript value to a JSON string....',
                parse: 'JSON.parse() method parses a JSON string...'
            }
        }, {
            jayson: {
                stringify: 'JSON.stringify() method converts a JavaScript value to a JSON string....',
                parse: 'JSON.parse() method parses a JSON string...'
            }
        }
    ],
    jayson: {
        stringify: 'JSON.stringify() method converts a JavaScript value to a JSON string....',
        parse: 'JSON.parse() method parses a JSON string...'
    }
};

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;
}