Benchmark: Lodash isEqual vs JSON stringify

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
_.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:

Run details: (Test run date: 2 days ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:152.0) Gecko/20100101 Firefox/152.0

Browser/OS: Firefox 152 on Mac OS X 10.15

View result in a separate tab

Test name	Executions per second
Lodash cloneDeep	98956744.0 Ops/sec
Json clone	1810486.6 Ops/sec

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: using Lodash's `isEqual` function to compare objects, and using the built-in `JSON.stringify` method to clone or compare objects.

**Lodash's `isEqual` Function**

* Purpose: To create a deep copy of an object and compare its contents with another object.
* Pros:
	+ Can handle complex data structures, such as arrays and objects with nested properties.
	+ Allows for specifying custom comparison functions.
* Cons:
	+ Requires the Lodash library to be loaded and included in the test environment.
	+ May have performance overhead due to the need to create a deep copy of the object.

**Built-in `JSON.stringify` Method**

* Purpose: To convert a JavaScript value to a JSON string, which can then be compared with another value.
* Pros:
	+ Fast and lightweight, as it only requires creating a string representation of the value.
	+ Does not require loading any additional libraries.
* Cons:
	+ Only works for serializing values that can be safely converted to a string (e.g., numbers, booleans, strings).
	+ May not handle complex data structures or custom objects correctly.

**Other Considerations**

The test also includes a reference to `jayson`, which is likely a typo and should refer to "JSON". This suggests that the benchmark was created with a specific JSON-related feature in mind, but it's unclear what this feature is supposed to be testing (e.g., parsing, stringification).

**Library: Lodash**

Lodash is a popular JavaScript utility library that provides a wide range of functions for tasks such as array manipulation, object creation, and more. In this benchmark, the `isEqual` function is used to compare objects.

**Test Cases**

There are two test cases:

1. **Lodash cloneDeep**: This test case uses Lodash's `isEqual` function to create a deep copy of the `MyObject` and then compares it with the original object.
2. **Json clone**: This test case uses the built-in `JSON.stringify` method to serialize the `MyObject` and then compares the resulting string with another string that is created by serializing the same object.

**Benchmark Results**

The latest benchmark results show the performance of each test case on a Chrome 130 browser, with the following data:

* Lodash cloneDeep: 10432824 executions per second
* Json clone: 1805333.375 executions per second

This suggests that Lodash's `isEqual` function is significantly faster than using the built-in `JSON.stringify` method for this specific use case.

**Alternatives**

If you're looking for alternatives to these approaches, here are a few options:

1. **JSON.parse()` and `JSON.stringify()`: These methods can be used together to create a deep copy of an object.
2. **Object.assign()` and spread operator: These methods can be used to create a shallow copy of an object.
3. ** libraries like Immer or Ramda**: These libraries provide functions for working with data structures, such as objects and arrays, that may be more suitable for this use case than Lodash's `isEqual` function.

Keep in mind that the best approach will depend on your specific requirements and constraints.

Related benchmarks:

Lodash isEqual vs JSON stringify (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

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