Benchmark: Lodash cloneDeep vs JSON Clone

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 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: 10 months ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/137.0.0.0 Safari/537.36

Browser/OS: Chrome 137 on Windows

View result in a separate tab

Test name	Executions per second
Lodash cloneDeep	948196.9 Ops/sec
Json clone	886846.1 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's dive into the world of MeasureThat.net and explore what's being tested in this benchmark.

**Benchmark Overview**

The benchmark compares two approaches to create a deep copy of an object: using the `cloneDeep` function from Lodash and using the `JSON.parse(JSON.stringify())` method. The test case creates a sample object `MyObject` with nested properties, including objects and arrays.

**Options Compared**

Two options are compared:

1. **Lodash cloneDeep**: This approach uses the `cloneDeep` function from Lodash to create a deep copy of the object. Lodash is a utility library that provides functions for functional programming tasks.
2. **JSON Clone**: This approach uses the `JSON.parse(JSON.stringify())` method, which converts the original object into a JSON string and then parses it back into an object.

**Pros and Cons**

1. **Lodash cloneDeep**:
	* Pros:
		+ Provides a more efficient and flexible way to create deep copies of objects.
		+ Offers additional features like handling circular references.
	* Cons:
		+ Requires including the Lodash library in your code.
2. **JSON Clone**:
	* Pros:
		+ Does not require any external libraries.
		+ Can be a simple and straightforward solution for small objects.
	* Cons:
		+ May not work correctly with complex objects or circular references.
		+ Can be slower than `cloneDeep` due to the overhead of converting to JSON and parsing back.

**Library: Lodash**

Lodash is a popular utility library that provides functions for functional programming tasks, such as array manipulation, object transformation, and more. The `cloneDeep` function is part of this library and is specifically designed to create deep copies of objects.

**Other Considerations**

* **Memory Allocation**: When creating a copy of an object using `cloneDeep`, Lodash allocates new memory for the copied object, which can be beneficial if the original object is large and you want to avoid modifying it.
* **Caching**: MeasureThat.net may cache the results of previous runs to reduce the execution time. If this happens, your benchmark result might not reflect the actual performance of your specific code.

**Special JS Feature or Syntax**

None mentioned in the provided benchmark definition.

**Alternative Approaches**

Other approaches to create deep copies of objects include:

1. **Using `Object.assign()`**: This method creates a shallow copy of an object by copying its enumerable properties.
2. **Using `Array.prototype.slice()` and `JSON.stringify()`**: This approach creates a deep copy of arrays, but may not work correctly with objects.
3. **Using a recursive function**: You can write a custom recursive function to create a deep copy of an object, which would be slower than using `cloneDeep`.

Keep in mind that these alternative approaches might not offer the same level of performance or convenience as using Lodash's `cloneDeep` function.

Related benchmarks:

Lodash cloneDeep vs JSON Clone (version: 0)

Comparing performance of: Lodash cloneDeep vs Json clone

Created: 8 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

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