Benchmark: lodash clonedeep vs json.parse(stringify())

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 = [{
        "id": 62,
        "name": "option 1 test",
        "address": {
            "id": 62,
            "name": null,
            "addressLine2": null,
            "addressLine1": null,
            "city": "LONDON",
            "country": null,
            "postal": null,
            "latitude": null,
            "longitude": null,
            "description": null,
            "transport": [{
                "id": 2,
                "description": "instrcution bus 1",
                "type": "BUS"
            }],
            "contact": "",
            "media": [{
                    "id": 97,
                    "url": "https://headout-test.s3.us-west-2.amazonaws.com/media/Nitisha Chhatwani Resume (1)-2 (2).pdf"
                },
                {
                    "id": 98,
                    "url": "https://headout-test.s3.us-west-2.amazonaws.com/media/Nitisha Chhatwani Resume (1)-2 (2).pdf"
                },
                {
                    "id": 99,
                    "url": "https://headout-test.s3.us-west-2.amazonaws.com/media/Nitisha Chhatwani Resume (1)-2 (2).pdf"
                },
                {
                    "id": 100,
                    "url": "https://headout-test.s3.us-west-2.amazonaws.com/media/Nitisha Chhatwani Resume (1)-2 (2).pdf"
                },
                {
                    "id": 101,
                    "url": "https://headout-test.s3.us-west-2.amazonaws.com/media/Nitisha Chhatwani Resume (1)-2 (2).pdf"
                }
            ]
        },
        "redemptionAddress": null,
        "referenceCode": null,
        "inclusions": [],
        "exclusions": [],
        "hotelTransfer": null,
        "hotels": null,
        "isCancellable": null,
        "canReschedule": null,
        "isRedemptionMeetingPointSame": null,
        "offlineRedemption": null,
        "fulfilmentType": null,
        "freesaleOptionSetting": null,
        "apiOptionSetting": null,
        "onRequestOptionSetting": null,
        "portalOptionSetting": null,
        "periodType": null,
        "periodDurationHours": 0,
        "periodDurationMinutes": 0,
        "cancellationDuration": null,
        "rescheduleDuration": null,
        "paxSettings": [{
            "id": 2,
            "ageFrom": 1,
            "ageTo": 2,
            "description": "",
            "paxType": "INFANT"
        }]
    },
    {
        "id": 136,
        "name": null,
        "address": {
            "id": 142,
            "name": null,
            "addressLine2": null,
            "addressLine1": null,
            "city": "LONDON",
            "country": null,
            "postal": null,
            "latitude": null,
            "longitude": null,
            "description": null,
            "transport": [],
            "contact": "",
            "media": []
        },
        "redemptionAddress": null,
        "referenceCode": null,
        "inclusions": [],
        "exclusions": [],
        "hotelTransfer": null,
        "hotels": null,
        "isCancellable": null,
        "canReschedule": null,
        "isRedemptionMeetingPointSame": null,
        "offlineRedemption": null,
        "fulfilmentType": null,
        "freesaleOptionSetting": null,
        "apiOptionSetting": null,
        "onRequestOptionSetting": null,
        "portalOptionSetting": null,
        "periodType": null,
        "periodDurationHours": 0,
        "periodDurationMinutes": 0,
        "cancellationDuration": null,
        "rescheduleDuration": null,
        "paxSettings": [{
            "id": 63,
            "ageFrom": 1,
            "ageTo": 2,
            "description": "",
            "paxType": "INFANT"
        }]
    }
];

var myCopy = null;

Tests:

Lodash CloneDeep
myCopy = _.cloneDeep(MyObject);
Json Clone
myCopy = JSON.parse(JSON.stringify(MyObject));

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Lodash CloneDeep
Json Clone

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/109.0.0.0 Safari/537.36

Browser/OS: Chrome 109 on Linux

View result in a separate tab

Test name	Executions per second
Lodash CloneDeep	79389.3 Ops/sec
Json Clone	91579.3 Ops/sec

Autogenerated LLM Summary (model llama3.2:3b, generated 2 months ago):

LLMs can make mistakes. Check important info.

I'll break down the provided benchmark definition and explain what's being tested, the options compared, their pros and cons, and other considerations.

**Benchmark Definition**

The test consists of two individual benchmark cases:

1. "Lodash CloneDeep"
2. "Json Clone"

**Options Compared**

For each benchmark case, the following options are compared:

a. **Lodash CloneDeep**
	* Option: `lodash.cloneDeep(MyObject)`
	* Purpose: Deeply clone the `MyObject` JSON object using Lodash's `cloneDeep` function.
b. **Json Clone**
	* Option: `JSON.parse(JSON.stringify(MyObject))`

**Pros and Cons**

a. **Lodash CloneDeep**

Pros:

1. Performance: Cloning a deeply nested object can be slower than other methods due to the overhead of recursively iterating over the object's properties.
2. Safety: Using `cloneDeep` ensures that the cloned object is an independent copy, which can prevent unexpected behavior or side effects.

Cons:

1. Overhead: The Lodash library needs to be included in the test environment, which can introduce additional dependencies and potential performance overhead.
2. Complexity: Cloning a deeply nested object can lead to complex code, making it harder to debug and maintain.

b. **Json Clone**

Pros:

1. Simplicity: Using `JSON.parse(JSON.stringify(MyObject))` is a straightforward and well-known method for cloning JSON objects.
2. Performance: This method is generally faster than using Lodash's `cloneDeep` due to its simplicity and lack of overhead.

Cons:

1. Inability to handle circular references: If the original object contains circular references (e.g., an object that references itself), the cloned object will also contain these references, leading to infinite recursion.
2. Loss of metadata: The cloned object will not retain the same metadata as the original object (e.g., timestamps or other non-numeric properties).

**Other Considerations**

1. **Caching**: Both methods may benefit from caching intermediate results or using memoization to avoid redundant calculations.
2. **Browser-specific optimizations**: Some browsers, like Chrome, have built-in optimizations for JSON parsing and cloning that might affect the benchmark results.

In summary, Lodash's `cloneDeep` provides safety guarantees by creating an independent copy of the object, but comes with a performance overhead due to the library's complexity. The `JSON.parse(JSON.stringify(MyObject))` method is simpler and faster but may not handle circular references or retain metadata.

Related benchmarks:

lodash clonedeep vs json.parse(stringify()) (version: 0)

Comparing performance of: Lodash CloneDeep vs Json Clone

Created: one year ago by: Guest

Jump to the latest result

Lodash CloneDeep

Json Clone

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 2 months ago):