Benchmark: lodash cloneDeep vs Es6 Spread Operator V2

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.15/lodash.min.js'></script>

Script Preparation code:

var bigObj = {
    basic: {
        vf: {
            agreeAll: true,
            email: {isAgree: true, code: 'x_vf_email'},
            post: {isAgree: true, code: 'x_vf_post'},
            smsMmsPush: {isAgree: true, code: 'x_vf_sms_mms_push'},
            outboundCall: {isAgree: true, code: 'x_vf_outbound_call'},
            basicProf: {isAgree: true, code: 'x_vf_cust_service_data'}
        },
        partner: {
            agreeAll: true,
            email: {isAgree: true, code: 'x_ext_email'},
            post: {isAgree: true, code: 'x_ext_post'},
            smsMmsPush: {isAgree: true, code: 'x_ext_sms_mms_push'},
            outboundCall: {isAgree: true, code: 'x_ext_outbound_call'},
            basicProf: {isAgree: true, code: 'x_ext_cust_service_data'}
        }
    },
    advanceProfiling: {
        vf: {
            agreeAll: false,
            networkData: {isAgree: null, code: 'x_vf_network_data'},
            onlineData: {isAgree: null, code: 'x_vf_online_data'}
        },
        partner: {
            agreeAll: false,
            networkData: {isAgree: null, code: 'x_ext_network_data'},
            onlineData: {isAgree: null, code: 'x_ext_online_data'}
        }
    }
}

Tests:

lodash cloneDeep
var newObj = _.cloneDeep(bigObj);
ES6 Spread Operator
var newObj = {...bigObj}

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
lodash cloneDeep
ES6 Spread Operator

Fastest: N/A

Slowest: N/A

Latest run results:

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

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Let's dive into the world of JavaScript microbenchmarks!

**What is being tested?**

MeasureThat.net is testing two different approaches for creating a deep copy of an object: `lodash.cloneDeep` and the ES6 Spread Operator (`{...object}`).

The benchmark creates a large object `bigObj`, which has multiple nested objects, to test the efficiency of these two methods. The `lodash.cloneDeep` method is a popular utility function from the Lodash library that creates a deep copy of an object.

**Options being compared**

There are two options being compared:

1. **Lodash `cloneDeep`**: This method creates a deep copy of the entire object graph, including all nested objects and arrays.
2. **ES6 Spread Operator (`{...object}`)**: This syntax creates a shallow copy of an object, only copying the top-level properties.

**Pros and Cons**

1. **Lodash `cloneDeep`**:
	* Pros:
		+ Creates a deep copy of the entire object graph, which is useful for ensuring that changes to nested objects don't affect the original.
		+ Can be more reliable than the ES6 Spread Operator when working with complex object graphs.
	* Cons:
		+ Can be slower due to its recursive nature and potential overhead from the Lodash library.
2. **ES6 Spread Operator (`{...object}`)**:
	* Pros:
		+ Faster and more lightweight compared to `cloneDeep`, as it only copies top-level properties.
		+ Can be useful for creating a shallow copy of an object when you only need to modify certain properties.
	* Cons:
		+ May not work correctly if the original object has circular references or other complex structures.
		+ Requires careful consideration to ensure that changes made to the copied object don't affect the original.

**Library and its purpose**

The `lodash` library is a popular JavaScript utility library that provides various functions for tasks such as string manipulation, array operations, and more. The `cloneDeep` function is one of these utilities, designed specifically for creating deep copies of objects.

**Special JS feature or syntax**

There is no special JavaScript feature or syntax being tested in this benchmark. However, it's worth noting that some older browsers may not support the ES6 Spread Operator, so the results might be affected by browser compatibility issues.

**Other alternatives**

For creating a deep copy of an object, other alternatives to `lodash.cloneDeep` include:

* Using the `Object.assign()` method with `Array.prototype.slice()`.
* Utilizing libraries like `immer` or `fast-json-stable-stringify`.
* Implementing your own recursive function for creating a deep copy.

Keep in mind that each approach has its trade-offs, and the best choice depends on the specific requirements of your project.

Related benchmarks:

lodash cloneDeep vs Es6 Spread Operator V2 (version: 1)

Comparing performance of: lodash cloneDeep vs ES6 Spread Operator

Created: 6 years ago by: Registered User

Jump to the latest result

lodash cloneDeep

ES6 Spread Operator

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

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