Benchmark: Lodash cloneDeep vs JSON Clone fork

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,
  arr: [1, 2, 3, 4, 5],
  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:

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

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Let's break down the provided benchmark and explain what's being tested, compared, and the pros/cons of each approach.

**Benchmark Overview**

The benchmark compares two methods for creating a deep copy of an object: Lodash's `cloneDeep` function and the built-in JavaScript method `JSON.parse(JSON.stringify())`. The test case creates a sample object `MyObject` with nested properties, including arrays and objects. The goal is to measure which approach is faster.

**Options Compared**

There are two options being compared:

1. **Lodash's cloneDeep function**: This is a utility function from the Lodash library that recursively clones an object, preserving its structure and values.
2. **JSON.parse(JSON.stringify()) method**: This built-in JavaScript method parses a JSON string and reconstructs an object with the same properties as the original object.

**Pros and Cons of Each Approach**

**Lodash's cloneDeep function:**

Pros:

* Preserves the entire object graph, including arrays and objects.
* Can handle complex data structures, such as cyclic references.
* Typically faster than `JSON.parse(JSON.stringify())` due to its optimized implementation.

Cons:

* Requires an external library (Lodash) to be included in the test environment.
* May have a higher overhead due to the complexity of the cloning process.

**JSON.parse(JSON.stringify()) method:**

Pros:

* Built-in, so no additional libraries are required.
* Simple and efficient implementation.
* Fast and lightweight execution.

Cons:

* Only works for simple objects with a small number of properties. If the object graph is too complex, it may fail or produce incorrect results due to issues like cyclic references.
* Does not preserve the original object's structure or values; instead, it creates a new object with the same properties.

**Other Considerations**

The test case assumes that both methods will work correctly for simple objects with nested properties. However, if the input data is complex or contains cyclic references, `JSON.parse(JSON.stringify())` may not produce the expected results. In such cases, Lodash's `cloneDeep` function would be a better choice.

**Library and Syntax Used**

In this benchmark, the Lodash library is used for its `cloneDeep` function. No special JavaScript features or syntax are mentioned in the test case.

**Alternatives**

If you wanted to compare other methods for creating deep copies of objects, some alternatives could include:

* **Array.prototype.slice()**: Creates a shallow copy of an array by returning a new array with references to the same elements as the original array.
* **Array.prototype.reduce()**: Can be used to create a deep copy of an object by recursively traversing its properties and cloning each value.
* **Recursion**: A function can be written to recursively traverse an object's properties and clone each value, creating a new object with the same structure.

However, these alternatives may not be as efficient or robust as Lodash's `cloneDeep` function, especially for complex data structures.

Related benchmarks:

Lodash cloneDeep vs JSON Clone fork (version: 0)

Comparing performance of: Lodash cloneDeep vs Json clone

Created: 5 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

No previous run results

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