Benchmark: DeepClone Benchmarks

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

Script Preparation code:

var o = {
 a: {
   b: 1,
   c: 2,
   d: 3,
   j: {
     k: [1,2,3],
     l: [4,5,6]
   },
 },
 e: [1,2,3,4,5,6],
 f: 1,
 g: {
   h: 1,
 }
}

Tests:

Lodash cloneDeep
const a = _.cloneDeep(o)
JSON PARSE JSON STRINGIFY
const a = JSON.parse(JSON.stringify(o))

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Lodash cloneDeep
JSON PARSE JSON STRINGIFY

Fastest: N/A

Slowest: N/A

Latest run results:

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

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Let's dive into the world of JavaScript microbenchmarks.

**What is being tested?**

The provided benchmark definition and test cases measure the performance of two different approaches to deep cloning an object in JavaScript:

1. **Lodash `cloneDeep`**: This function creates a deep copy of an object, which means it recursively clones all nested objects and arrays.
2. **JSON parsing and stringifying**: This approach uses the `JSON.parse()` and `JSON.stringify()` methods to clone an object.

**Options compared**

The two options are:

1. **Lodash `cloneDeep`**: A third-party library function that provides a efficient way to deep clone objects.
2. **JSON parsing and stringifying**: A built-in JavaScript method that uses the browser's internal JSON parser and serializer.

**Pros and cons of each approach**

1. **Lodash `cloneDeep`**:
	* Pros:
		+ Efficient and optimized for performance
		+ Handles complex object structures, including arrays and nested objects
	* Cons:
		+ Requires an additional library import
		+ May have a higher memory footprint due to the overhead of the Lodash clone function
2. **JSON parsing and stringifying**:
	* Pros:
		+ Built-in method, no additional library required
		+ Fast and efficient for simple object cloning
	* Cons:
		+ Can be slow for complex object structures
		+ May not handle all edge cases or errors well

**Library: Lodash**

Lodash is a popular JavaScript utility library that provides a wide range of functions for tasks such as array manipulation, object transformation, and more. In this case, the `cloneDeep` function is used to create deep copies of objects.

**Special JS feature/syntax**

None mentioned in the provided code snippet.

**Benchmark result analysis**

The latest benchmark result shows that:

1. **Lodash `cloneDeep`**: 127346.71875 executions per second
2. **JSON parsing and stringifying**: 143338.4375 executions per second

This suggests that, for this specific test case, the JSON parsing and stringifying approach is slightly faster than using Lodash's `cloneDeep` function.

**Other alternatives**

If you're interested in exploring other options, here are a few:

1. **Built-in `Object.assign()`**: This method can be used to create a shallow copy of an object.
2. **`Array.prototype.slice()` and `Array.prototype.concat()`**: These methods can be used to clone arrays.
3. **Other libraries**: There are many other JavaScript libraries available that provide deep cloning functions, such as `lodash-es`, `immer`, or `deepcopy`.

Keep in mind that the best approach depends on your specific use case and requirements.

Related benchmarks:

DeepClone Benchmarks (version: 0)

Comparing performance of: Lodash cloneDeep vs JSON PARSE JSON STRINGIFY

Created: 4 years ago by: Guest

Jump to the latest result

Lodash cloneDeep

JSON PARSE JSON STRINGIFY

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):