Benchmark: Lodash cloneDeep vs JSON.parse

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...'
  }
};

var MyObjectString = JSON.stringify(MyObject)

var myCopy = null;

Tests:

Lodash cloneDeep
myCopy = _.cloneDeep(MyObject);
JSON Parse
myCopy = JSON.parse(MyObjectString);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Lodash cloneDeep
JSON Parse

Fastest: N/A

Slowest: N/A

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

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The provided benchmark tests the performance of two approaches for creating a deep copy of an object in JavaScript: using the `structuredClone` method and using Lodash's `cloneDeep` function.

**Structured Clone Method**

The structured clone method is a new way to create a deep copy of an object in modern browsers, introduced in ECMAScript 2020. It allows you to create a deep copy of an object by calling the `structuredClone()` method on it, passing in `JSON.stringify()` as the first argument and a function that returns the object's value.

In this benchmark, the structured clone method is used to create a deep copy of the `MyObject` object. When executed, the code creates a new object using `JSON.stringify(MyObject)` and then calls `structuredClone(MyObjectString)` to create a deep copy of it.

**Lodash CloneDeep Function**

The Lodash library provides a `cloneDeep()` function that can be used to create a deep copy of an object. This function recursively clones all properties of the original object, creating new objects for each property and its children.

In this benchmark, the Lodash `cloneDeep` function is used to create a deep copy of the `MyObject` object. The code creates a variable `myCopy` using `_.cloneDeep(MyObject)`.

**Comparison**

The two approaches have different pros and cons:

* **Structured Clone Method:**
	+ Pros:
		- Fast and efficient, as it uses the browser's built-in cloning algorithm.
		- Simple to implement.
	+ Cons:
		- Only supported in modern browsers that support ECMAScript 2020.
		- May not work correctly with older browsers or legacy JavaScript environments.
* **Lodash CloneDeep Function:**
	+ Pros:
		- Widely supported across different browsers and JavaScript environments.
		- Can handle complex object structures, including nested arrays and objects.
	+ Cons:
		- Slower than the structured clone method, as it needs to recursively clone all properties.

**Library**

The Lodash library is a popular utility library for JavaScript that provides a set of functional programming helpers. In this benchmark, the `cloneDeep` function from Lodash is used to create a deep copy of the `MyObject` object.

**Special JS Feature/ Syntax**

None of the test cases use any special JavaScript features or syntax that requires expertise in those areas.

**Alternatives**

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

* **Array.prototype.slice()**: Creates a shallow copy of an array. Not suitable for objects with nested arrays or complex structures.
* **Object.assign()**: Creates a shallow copy of an object. Not suitable for objects with nested arrays or complex structures.
* **For...in loops**: Can be used to create a deep copy of an object, but is slower and more verbose than the structured clone method or Lodash `cloneDeep` function.

In general, if you need to work with large datasets or complex object structures, using the structured clone method or Lodash `cloneDeep` function may be a good choice. For smaller projects or simpler use cases, the built-in array and object methods may suffice.

Related benchmarks:

Lodash cloneDeep vs JSON.parse (version: 0)

https://developer.mozilla.org/en-US/docs/Web/API/structuredClone

Comparing performance of: Lodash cloneDeep vs JSON Parse

Created: 3 years ago by: Guest

Jump to the latest result

Lodash cloneDeep

JSON Parse

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):