Benchmark: Lodash cloneDeep vs JSON Clone with a method

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 = {
  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...'
  },
  methods: function() {
    console.log('hello world')
  },
};

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:

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

LLMs can make mistakes. Check important info.

Let's break down what's being tested in this benchmark.

**Benchmark Purpose**

The goal of this benchmark is to compare the performance of two methods for creating a deep copy of an object: Lodash's `cloneDeep` function and the native `JSON.parse(JSON.stringify())` method.

**Options Compared**

There are two options being compared:

1. **Lodash cloneDeep**: A function from the popular utility library Lodash that creates a deep copy of an object.
2. **JSON Clone with a Method**: The native JavaScript method `JSON.parse(JSON.stringify())`, which also creates a deep copy of an object.

**Pros and Cons**

Here are some pros and cons of each approach:

* **Lodash cloneDeep**:
	+ Pros: Fast, efficient, and reliable. Lodash is a mature library with extensive testing.
	+ Cons: Requires including the additional library in your project, which may add overhead.
* **JSON Clone with a Method**:
	+ Pros: Native implementation, so no additional dependencies are required. Can be faster since it doesn't require a library.
	+ Cons: Less efficient than Lodash's implementation due to the need to parse and stringify JSON.

**Library and Its Purpose**

The `JSON` object in JavaScript is used for working with JSON data. The `parse()` method takes a string as input and returns a JavaScript object, while the `stringify()` method converts a JavaScript object to a JSON string. The `JSON.parse(JSON.stringify(obj))` trick uses these methods together to create a deep copy of an object.

**Special JS Feature or Syntax**

There is no special JavaScript feature or syntax being used in this benchmark. It's purely about comparing two implementation approaches for creating a deep copy of an object.

**Other Alternatives**

If you need to create a deep copy of an object, other alternatives include:

* **Array.prototype.slice() + Object.assign()**: Create a shallow copy by slicing the array and then merging it with `Object.assign()`.
* **For...in loop**: Use a manual approach by iterating over the object's properties using a `for...in` loop.
* **Other libraries**: Depending on your specific requirements, other libraries like Immutable.js or TypeScript might offer alternative implementations.

In summary, this benchmark compares two methods for creating a deep copy of an object: Lodash's efficient but library-dependent `cloneDeep` function and the native but less efficient `JSON.parse(JSON.stringify())` method.

Related benchmarks:

Lodash cloneDeep vs JSON Clone with a method (version: 0)

Comparing performance of: Lodash cloneDeep vs Json clone

Created: 6 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):