Benchmark: Lodash.isEqual vs JSON.stringify Equality Comparison for 1000 length array

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

Script Preparation code:

window.foo = new Array(1000).fill(0).map((_, i) => i * 2)
window.bar = new Array(1000).fill(0).map((_, i) => i * 2)

Tests:

Lodash
_.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
Lodash
JSON stringify

Fastest: N/A

Slowest: N/A

Latest run results:

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

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Let's break down the benchmark and its test cases.

**Benchmark Overview**

The benchmark measures the performance of two approaches to compare equality between two arrays: Lodash's `isEqual` function and the `===` operator with JSON stringification.

**Test Cases**

There are two individual test cases:

1. **Lodash**: This test case compares the result of calling `_.isEqual(window.foo, window.bar)`, where `window.foo` and `window.bar` are two large arrays created using a script preparation code.
2. **JSON stringify**: This test case compares the result of checking if two strings are equal using JSON stringification: `JSON.stringify(window.foo) === JSON.stringify(window.bar)`.

**Options Compared**

The benchmark is comparing two approaches:

1. **Lodash's `isEqual` function**: A custom implementation of equality comparison, likely optimized for performance.
2. **JavaScript's built-in `===` operator with JSON stringification**: The standard way to compare equality between objects or arrays in JavaScript.

**Pros and Cons**

Here are some pros and cons of each approach:

**Lodash's `isEqual` function:**

Pros:

* Highly optimized and likely to be faster than the standard `===` operator.
* May provide more accurate results due to its custom implementation.
* Is part of a larger library, which might include other useful functions.

Cons:

* Requires including an external library (Lodash).
* May have additional overhead due to dependency loading.

**JavaScript's built-in `===` operator with JSON stringification:**

Pros:

* No external dependencies or overhead.
* Simple and widely supported.
* Fast for most use cases.

Cons:

* May not be as fast as Lodash's implementation, especially for large arrays or complex data structures.
* Less accurate than a custom implementation like Lodash's `isEqual` function.

**Library: Lodash**

Lodash is a popular JavaScript utility library that provides a wide range of functions for tasks like array manipulation, object creation, and string manipulation. In this case, the `isEqual` function is part of Lodash's collection of equality checks.

**Special JS Feature/Syntax**

There doesn't appear to be any special JavaScript features or syntax used in this benchmark. The script preparation code creates two arrays using a simple arrow function, and the test cases use standard JavaScript operators.

**Other Alternatives**

If you wanted to implement a similar comparison using only JavaScript's built-in functions, you could try using `Array.prototype.every()` or `Array.prototype.some()` in combination with `JSON.stringify()`. However, this would likely be slower and less efficient than Lodash's `isEqual` function.

Keep in mind that the choice of implementation depends on the specific requirements and constraints of your project. If performance is critical and you can include an external library, using Lodash's `isEqual` function might be the best option. Otherwise, the standard JavaScript `===` operator with JSON stringification should suffice.

Related benchmarks:

Lodash.isEqual vs JSON.stringify Equality Comparison for 1000 length array (version: 0)

Comparing performance of: Lodash vs JSON stringify

Created: 3 years ago by: Guest

Jump to the latest result

Lodash

JSON stringify

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):