Benchmark: Lodash cloneDeep / JSON Clone

HTML Preparation code:

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.0/angular.min.js"></script>
<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

Script Preparation code:

var MyObject = {
  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 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:

No previous run results

This benchmark does not have any results yet. Be the first one to run it!

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

LLMs can make mistakes. Check important info.

I'd be happy to help you understand the provided benchmark.

**Benchmark Overview**

The provided JSON represents a JavaScript microbenchmark named "Lodash cloneDeep / JSON Clone". This benchmark compares the performance of two approaches: using Lodash's `cloneDeep` function and using the built-in `JSON.parse(JSON.stringify())` method.

**Script Preparation Code**

The script preparation code defines an object `MyObject` with various properties, including a nested object `jayson`. The code also initializes a variable `myCopy` to null.

**Html Preparation Code**

The HTML preparation code includes two external JavaScript libraries:

1. AngularJS (version 1.2.0)
2. Lodash (version 4.17.5)

These libraries are not directly related to the benchmark, but they might be used elsewhere in the script or by other users.

**Individual Test Cases**

There are only two test cases:

### 1. Lodash cloneDeep

This test case uses Lodash's `cloneDeep` function to create a deep copy of `MyObject`. The benchmark definition code is: `myCopy = _.cloneDeep(MyObject);`.

**Pros and Cons**

* **Pros**:
	+ Lodash provides a well-tested and widely used implementation of deep cloning.
	+ Can handle complex objects with nested arrays and objects.
* **Cons**:
	+ Additional dependency on the Lodash library (which may not be included in all environments).
	+ May have a higher memory overhead compared to other approaches.

### 2. JSON clone

This test case uses the built-in `JSON.parse(JSON.stringify())` method to create a deep copy of `MyObject`. The benchmark definition code is: `myCopy = JSON.parse(JSON.stringify(MyObject));`.

**Pros and Cons**

* **Pros**:
	+ No additional dependency on external libraries.
	+ Typically faster and more lightweight than Lodash's implementation.
* **Cons**:
	+ May not work correctly with certain data types (e.g., functions, dates) or objects with cyclic references.
	+ Can be less reliable and less efficient for complex objects.

**Library: Lodash**

Lodash is a popular JavaScript utility library that provides various functional programming helpers. In this benchmark, `cloneDeep` is used to create a deep copy of an object, which is essential for this specific test case.

**Special JS Feature/Syntax**

None mentioned in the provided code.

**Other Alternatives**

If you're looking for alternative approaches to deep cloning objects, some options include:

1. **Array.prototype.slice()**: Creates a shallow copy of an array.
2. **Object.assign()**: Copies properties from one object to another.
3. **For...in loops**: Manually creates a deep copy by iterating over object properties and recreating them.

However, these alternatives may not be suitable for all use cases, especially when dealing with complex objects or arrays.

I hope this explanation helps you understand the provided benchmark!

Related benchmarks:

Lodash cloneDeep / JSON Clone (version: 0)

Comparing performance of: Lodash cloneDeep vs Json clone

Created: 3 years ago by: Guest

Jump to the latest result

Lodash cloneDeep

Json clone

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):