Benchmark: Lodash.isEqual vs JSON.stringify Equality Comparison for Array of Objects with Nesting

HTML Preparation code:

<script src="https://cdn.jsdelivr.net/npm/lodash@4.17.4/lodash.min.js"></script>

Script Preparation code:

window.foo = [{
    type: 'cat',
    name: 'Sarah',
    skills: ['meowing', 'eating', 'sleeping']
}, {
    type: 'dog',
    name: 'Felipe',
    skills: ['barking', 'eating', 'sleeping']
}, {
    type: 'bird',
    name: 'Maryanne',
    skills: ['tweeting', 'eating', 'sleeping']
}, ];
window.bar = [{
    type: 'cat',
    name: 'Sarah',
    skills: ['meowing', 'eating', 'sleeping']
}, {
    type: 'dog',
    name: 'Felipe',
    skills: ['barking', 'eating', 'sleeping']
}, {
    type: 'bird',
    name: 'Maryanne',
    skills: ['tweeting', 'eating', 'sleeping']
}, ];

Tests:

_.isEqual
_.isEqual(window.foo, window.bar)
JSON.stringify
JSON.stringify(window.foo) === JSON.stringify(window.bar);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
_.isEqual
JSON.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

JSON.stringify

1.5M/s

_.isEqual

1.0M/s

View exact numbers

Test name	Executions per second
✓ JSON.stringify	1,538,571 Ops/sec
_.isEqual	1,025,920 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 benchmark and explain what's being tested.

**Benchmark Overview**

The benchmark is designed to compare the performance of two approaches:

1. Using Lodash (`_.isEqual` function) for equality comparison between two arrays of objects.
2. Using `JSON.stringify` for equality comparison between two arrays of objects.

**Options Being Compared**

We have two options being compared:

**Option 1: Lodash (`_.isEqual` function)**

* Library: Lodash (a popular JavaScript utility library)
* Purpose: Provides a comprehensive set of functions for working with arrays, objects, and more. In this case, it's used to compare the equality of two arrays.
* Pros:
	+ Widely adopted and well-maintained library
	+ Supports various comparison scenarios, including deep object comparisons
	+ Often used in production code due to its popularity
* Cons:
	+ Additional dependency on Lodash (potentially larger bundle size)
	+ May introduce overhead due to the use of a utility library

**Option 2: `JSON.stringify`**

* Library: Built-in JavaScript function (`JSON.stringify`)
* Purpose: Converts an object or array into a JSON string, which can be used for equality comparison.
* Pros:
	+ No additional dependency on external libraries
	+ Fast and lightweight (typically around 1-2 kilobytes)
	+ Widely supported across browsers and platforms
* Cons:
	+ May not work well with complex data structures or nested objects
	+ Can lead to issues with deep object comparisons

**Additional Considerations**

The benchmark also includes the use of two arrays, `window.foo` and `window.bar`, which contain similar data. This helps to isolate the comparison logic from other factors that might influence performance.

**Library: Lodash**

Lodash is a popular JavaScript utility library that provides a wide range of functions for working with arrays, objects, and more. In this benchmark, it's used to compare the equality of two arrays using the `_.isEqual` function. Other notable features of Lodash include:

* Array manipulation functions (e.g., `map`, `filter`, `reduce`)
* Object manipulation functions (e.g., `clone`, `merge`, `assign`)
* String manipulation functions (e.g., `truncate`, `escapeRegExp`, `escapeHTML`)

**JavaScript Features/ Syntax**

There are no special JavaScript features or syntax being tested in this benchmark. The code relies on standard JavaScript features and libraries, making it accessible to a wide range of developers.

**Alternatives**

If you need to compare the performance of equality comparison approaches, you may consider using other libraries or implementations, such as:

* Immer.js: A library for predictable, immutable data structures
* Fast Json: A lightweight JSON parsing library
* Slick-json: A fast and efficient JSON stringification library

Keep in mind that the choice of implementation ultimately depends on your specific use case, performance requirements, and personal preferences.

Lodash.isEqual vs JSON.stringify Equality Comparison for Array of Objects with Nesting (version: 0) Benchmark.js

Test on isEqual performance

Comparing performance of: `_.isEqual vs JSON.stringify`

Created: 5 years ago by: Guest

Go to the latest result

_.isEqual

JSON.stringify

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

Lodash.isEqual vs JSON.stringify Equality Comparison for Array of Objects with Nesting (version: 0) Benchmark.js

Test on isEqual performance

Comparing performance of: _.isEqual vs JSON.stringify

Created: 5 years ago by: Guest

Go to the latest result

_.isEqual

JSON.stringify

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

Related benchmarks

Comparing performance of: `_.isEqual vs JSON.stringify`