Benchmark: Lodash cloneDeep vs structuredClone deep array

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...',
    jayson: {
    stringify: 'JSON.stringify() method converts a JavaScript value to a JSON string....',
    parse: 'JSON.parse() method parses a JSON string...',
      jayson: {
    stringify: 'JSON.stringify() method converts a JavaScript value to a JSON string....',
    parse: 'JSON.parse() method parses a JSON string...',
        jayson: {
    stringify: 'JSON.stringify() method converts a JavaScript value to a JSON string....',
    parse: 'JSON.parse() method parses a JSON string...'
  }
  }
  }
  }
};

var arr = []
for (let i = 0; i <=10000; i++) {
  arr.push(structuredClone(MyObject))
}
var myCopy = null;

Tests:

Lodash cloneDeep
myCopy = _.cloneDeep(arr);
Native structuredClone
myCopy = structuredClone(arr);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Lodash cloneDeep
Native structuredClone

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 5 months ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/142.0.0.0 Safari/537.36

Browser/OS: Chrome 142 on Windows

View result in a separate tab

Test name	Executions per second
Lodash cloneDeep	39.9 Ops/sec
Native structuredClone	37.2 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the benchmark and its options.

**Benchmark Definition**

The benchmark compares two approaches to create a deep copy of an array:

1. **Lodash cloneDeep**: The test uses the `cloneDeep` function from the Lodash library, which is a popular utility library for JavaScript.
2. **Native structuredClone**: The test uses the `structuredClone` API, which is a relatively new feature introduced in ECMAScript 2020.

**Options Compared**

The two options are compared in terms of their performance on creating a deep copy of an array with 10,000 elements.

**Pros and Cons**

1. **Lodash cloneDeep**:
	* Pros:
		+ Wide adoption and support across modern browsers.
		+ Well-maintained and widely tested library.
		+ Provides additional utility functions beyond just cloning arrays.
	* Cons:
		+ Adds an extra dependency to the benchmark (the Lodash library).
		+ May introduce some overhead due to the library's complexity.
2. **Native structuredClone**:
	* Pros:
		+ Built into modern browsers, reducing dependencies and potential overhead.
		+ Provides a more concise and efficient way to create deep copies.
	* Cons:
		+ Limited support across older browsers (prior to ECMAScript 2020).
		+ May require special handling for non-array values.

**Other Considerations**

1. **Library Purpose**: The Lodash library is a general-purpose utility library, providing a wide range of functions beyond just cloning arrays.
2. **JavaScript Feature**: The `structuredClone` API uses the `JSON` protocol to create deep copies, which is a relatively new feature introduced in ECMAScript 2020.

**Alternative Approaches**

Other approaches to creating deep copies include:

1. **Recursive Object Assign (ROA)**: A simple and efficient approach that iterates through the object's properties to create a deep copy.
2. **Array.prototype.slice()**: Creates a shallow copy of an array by iterating through its elements.
3. **For...of loop with JSON.parse(JSON.stringify())**: Another way to use `JSON.parse()` to create a deep copy, although this can be slower and more memory-intensive than `structuredClone`.

Keep in mind that the best approach depends on the specific requirements and constraints of your project.

Related benchmarks:

Lodash cloneDeep vs structuredClone deep array (version: 0)

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

Comparing performance of: Lodash cloneDeep vs Native structuredClone

Created: 3 years ago by: Guest

Jump to the latest result

Lodash cloneDeep

Native structuredClone

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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