Benchmark: Lodash isEqual vs JSON stringify2

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 = {
  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...'
  }
};

Tests:

Lodash cloneDeep
_.isEqual(MyObject, myCopy);
Json clone
JSON.stringify(MyObject) === JSON.stringify(myCopy);

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):

LLMs can make mistakes. Check important info.

Let's break down the provided JSON and explain what's being tested.

**Benchmark Overview**

The benchmark compares two approaches for creating clones of JavaScript objects:

1. Using Lodash's `isEqual` function to compare the cloned object with the original object.
2. Using `JSON.stringify` to create a string representation of the original object, then comparing it with the same string representation obtained from the cloned object.

**Options Compared**

The two options being compared are:

* **Lodash Clone Deep**: Uses Lodash's `cloneDeep` function to create a deep copy of the original object.
* **JSON Stringify Clone**: Uses `JSON.stringify` to convert the original object into a JSON string, and then compares this string with the same string obtained from the cloned object.

**Pros and Cons**

**Lodash Clone Deep:**

Pros:

* Provides a more precise comparison by checking the actual contents of both objects.
* Avoids issues related to JSON string formatting differences.

Cons:

* Requires Lodash library, which may add unnecessary overhead.
* May be slower due to the overhead of calling a function from a library.

**JSON Stringify Clone:**

Pros:

* Does not require any additional libraries or dependencies.
* Can be faster since it only involves string comparisons.

Cons:

* May fail if the objects have different JSON string formatting (e.g., indentation, quotes).
* Less precise comparison than using `cloneDeep`, as it relies on string equality rather than object content equality.

**Library Used**

In this benchmark, Lodash is used for its `cloneDeep` function. Lodash is a popular JavaScript library that provides various utility functions, including cloning and comparing objects.

**Special JS Feature/Syntax**

None mentioned in the provided JSON. However, it's worth noting that `JSON.stringify` can have issues with certain JavaScript features, such as:

* Cyclic references: If an object contains a reference to itself, `JSON.stringify` may enter an infinite loop.
* NaN (Not a Number) values: `JSON.stringify` may convert NaN values to "NaN" instead of the expected string representation.

**Alternatives**

Other alternatives for creating clones or comparing objects in JavaScript include:

* Using the built-in `Object.assign()` method with the spread operator (`...`) to create a shallow copy.
* Implementing custom cloning logic using recursion and/or iterating over object properties.
* Using other libraries like Immutable.js, which provides immutable data structures that can be cloned and compared.

Keep in mind that these alternatives may not provide the same level of precision or performance as Lodash's `cloneDeep` function.

Related benchmarks:

Lodash isEqual vs JSON stringify2 (version: 0)

Comparing performance of: Lodash cloneDeep vs Json clone

Created: 2 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):