Benchmark: Lodash isEqual vs JSON stringify kshitij

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, MyObject);
Json clone
JSON.stringify(MyObject) === 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):

LLMs can make mistakes. Check important info.

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

**Benchmark Definition**

The benchmark measures the performance of two approaches to create a deep copy of an object:

1. Using Lodash's `isEqual` function with `_cloneDeep`
2. Using JSON stringification (`JSON.stringify`) and comparison (`===`)

**What is being compared?**

The test cases compare the execution time of these two approaches on the same input data.

**Options Compared:**

* **Lodash cloneDeep**: This approach uses Lodash's `cloneDeep` function, which recursively creates a deep copy of an object. The `isEqual` function is used to verify that the cloned object is identical to the original.
* **Json clone**: This approach uses JSON stringification (`JSON.stringify`) and comparison (`===`) to create a deep copy of the object. The idea is to serialize the object into a JSON string, which can then be deserialized back into an object.

**Pros and Cons:**

* **Lodash cloneDeep**:
	+ Pros:
		- Provides a robust and efficient way to create deep copies of objects.
		- Handles complex data structures, such as arrays and objects with nested properties.
	+ Cons:
		- Requires Lodash library, which may add overhead.
		- May not be the most optimized solution, depending on the specific use case.
* **Json clone**:
	+ Pros:
		- Lightweight and simple to implement.
		- Can work well for small to medium-sized objects.
	+ Cons:
		- May not handle complex data structures or large objects efficiently.
		- Requires serialization and deserialization, which can introduce overhead.

**Library: Lodash**

Lodash is a popular JavaScript utility library that provides a wide range of functions for tasks such as array manipulation, string manipulation, and object creation. In this benchmark, `cloneDeep` is used to create deep copies of objects. The `isEqual` function is also part of the Lodash library and is used to compare two values.

**Special JS Features/Syntax:**

None mentioned in the provided benchmark definition. However, it's worth noting that JavaScript has several features that can impact performance, such as:

* Closures
* Hoisting
* Strict mode

These features may affect the performance of the benchmark results, but they are not directly related to the approaches being compared.

**Alternatives**

Other alternatives for creating deep copies of objects in JavaScript include:

* `Object.assign()`
* `Array.prototype.slice()` and `JSON.parse(JSON.stringify(obj))`
* Using a library like Immutable.js

Each of these alternatives has its own strengths and weaknesses, and may be more or less suitable depending on the specific use case.

Related benchmarks:

Lodash isEqual vs JSON stringify kshitij (version: 0)

Comparing performance of: Lodash cloneDeep vs Json clone

Created: 4 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):