Benchmark: Lodash isEqual vs JSON.stringify (array of objects)

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.14.168/lodash.min.js'></script>

Script Preparation code:

var obj1 = [{
    "latitude": 56.282,
    "longitude": 43.995,
    "_heatmapValue": 38680
}]

var obj2 = [{
    "latitude": 56.27,
    "longitude": 43.992,
    "_heatmapValue": 25439
}]

var result = null;

Tests:

lodash isEqual
result = _.isEqual(obj1, obj2);
stringify
result = JSON.stringify(obj1) === JSON.stringify(obj2);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
lodash isEqual
stringify

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.36

Browser/OS: Chrome 133 on Linux

View result in a separate tab

Test name	Executions per second
lodash isEqual	2177127.8 Ops/sec
stringify	2870652.5 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 benchmark and explain what's being tested, compared, and its pros and cons.

**Benchmark Definition**

The benchmark defines two test cases: `lodash isEqual` and `stringify`. The script preparation code creates two identical arrays of objects (`obj1` and `obj2`) with different values. The purpose of this setup is to compare the performance of these two approaches in identifying whether two objects are equal.

**Lodash isEqual**

Lodash's `isEqual` function is used to check if two objects have the same key-value pairs, regardless of data type. In this test case, Lodash's implementation checks for deep equality, meaning it compares not only the values but also the object structure and reference types.

Pros:

* Can handle complex object structures with nested arrays and objects.
* Ignores whitespace and other minor differences in object representation.
* Can be used to check for identical objects or arrays with similar data.

Cons:

* May introduce unnecessary overhead due to its recursive nature and potential use of caching.
* Can lead to slower performance if the objects have a large number of keys.

**JSON.stringify**

The `stringify` approach converts both objects to strings using `JSON.stringify`. This method returns a string representation of the object, including all key-value pairs and nested structures.

Pros:

* Fast and lightweight compared to Lodash's recursive implementation.
* Easy to implement and understand for developers without external dependencies.

Cons:

* May not handle complex object structures or data types accurately.
* Requires explicit handling of whitespace and formatting differences.
* Can lead to slower performance due to the overhead of string conversion.

**Library**

The benchmark uses the popular JavaScript library Lodash. Its purpose is to provide a set of utility functions, including `isEqual`, that can simplify code and improve readability. In this test case, it's used to compare two objects with identical data structures but different values.

**Special JS Features/Syntax**

There are no special JavaScript features or syntax being tested in this benchmark. The focus is on comparing the performance of two existing approaches: Lodash's `isEqual` function and the built-in `stringify` method.

**Other Alternatives**

If you need to compare the performance of object equality checks, you can consider using:

1. Built-in JavaScript methods: You can use built-in JavaScript methods like `===`, `==`, or even `Object.is()` (available in modern browsers) to check for equality.
2. Other library implementations: There are other libraries, such as Underscore.js or a custom implementation, that provide similar functionality to Lodash's `isEqual` function.

Keep in mind that the choice of approach depends on your specific use case and performance requirements.

Related benchmarks:

Lodash isEqual vs JSON.stringify (array of objects) (version: 0)

Comparing performance of: lodash isEqual vs stringify

Created: 3 years ago by: Guest

Jump to the latest result

lodash isEqual

stringify

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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