Benchmark: DeepClone A - MeasureThat.net

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: 3 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.141 Safari/537.36

Browser/OS: Chrome 87 on Windows

View result in a separate tab

Test name	Executions per second
Lodash cloneDeep	478902.0 Ops/sec
Json clone	255354.1 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's dive into the world of measuring JavaScript performance.

**Benchmark Definition:**

The provided JSON represents a benchmark definition for creating deep clones of an object using two different approaches:

1. **Lodash `cloneDeep` method**: This approach uses the Lodash library to create a deep clone of the input object.
2. **JSON string manipulation**: This approach manually creates a deep clone by converting the input object to a JSON string and then parsing it back into an object.

**Options Compared:**

The two approaches being compared are:

1. **Lodash `cloneDeep` method**
2. **Manual JSON string manipulation**

These options are being compared in terms of their performance, which is measured as the number of executions per second.

**Pros and Cons:**

### Lodash `cloneDeep` Method

Pros:

* **Convenient**: Lodash provides a well-tested and widely-used implementation of deep cloning.
* **Efficient**: The library has optimized algorithms for creating deep clones.
* **Easy to use**: Simply call the `cloneDeep` method on the input object.

Cons:

* **Dependency**: Requires including the Lodash library in your codebase.
* **Overhead**: Depending on the size of the cloned object, this approach may introduce additional overhead due to the library's implementation details.

### Manual JSON String Manipulation

Pros:

* **No dependencies**: Does not require any external libraries or dependencies.
* **Low overhead**: Creates a deep clone by simply converting the input object to a string and then parsing it back into an object.

Cons:

* **Error-prone**: Manually creating a deep clone can be prone to errors, especially for complex objects with nested properties.
* **Performance overhead**: The process of converting an object to a JSON string and then parsing it back may introduce additional performance overhead.

**Other Considerations:**

* **Memory usage**: Both approaches allocate new memory for the cloned object. However, Lodash's implementation may be more efficient in terms of memory allocation due to its optimized algorithms.
* **Thread safety**: If multiple threads are accessing the same data structure, consider using synchronization mechanisms to ensure thread safety.

**Library: Lodash**

Lodash is a popular JavaScript utility library that provides a wide range of functions for working with arrays, objects, strings, and more. The `cloneDeep` method is specifically designed to create deep clones of complex data structures, including nested objects and arrays.

In the provided benchmark definition, Lodash is used as a dependency in the "Html Preparation Code" section, which includes a script tag that loads the library's minified version.

**Special JS Feature/Syntax:**

None mentioned in this explanation. However, if you're interested in exploring other JavaScript features or syntax, feel free to ask!

**Alternatives:**

If you prefer not to use Lodash or want to explore alternative approaches, consider the following options:

1. **`Object.assign()`**: This method can be used to create a shallow copy of an object. However, it may not work as expected for deep cloning objects with nested properties.
2. **`JSON.parse(JSON.stringify())`**: As mentioned earlier, this approach manually creates a deep clone by converting the input object to a JSON string and then parsing it back into an object.
3. **Custom implementation using recursion or iteration**: Depending on your specific use case, you may need to implement a custom cloning function using recursive or iterative approaches.

Keep in mind that these alternatives may introduce additional complexity, error-prone code, or performance overhead compared to the Lodash `cloneDeep` method.

Related benchmarks:

DeepClone A (version: 0)

Comparing performance of: Lodash cloneDeep vs Json clone

Created: 3 years ago by: Guest

Jump to the latest result

Lodash cloneDeep

Json clone

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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