Benchmark: Lodash isEqual vs Lodash difference

HTML Preparation code:

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.15/lodash.min.js"></script>

Script Preparation code:

window.foo1 = [1,2,3,4,5,6,7,8,9,10,11,12];
window.bar1 = [33,10,11,12,1,2,3,4,5,6,7,8,9,44];

Tests:

_.isEqual
_.isEqual(window.foo1, window.bar1)
_.difference
_.difference(window.foo1, window.bar1)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
_.isEqual
_.difference

Fastest: N/A

Slowest: N/A

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

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and its results.

**Benchmark Definition**

The benchmark is testing two functions from the Lodash library:

1. `isEqual`: Returns `true` if the two arrays have the same elements, in any order, without duplicates. Otherwise, it returns `false`.
2. `difference`: Returns an array containing elements that are present in `foo1` but not in `bar1`, and vice versa.

**Options Compared**

The benchmark is comparing the performance of these two functions from Lodash:

* `isEqual`
* `difference`

**Pros and Cons of Different Approaches**

* **Lodash `isEqual`**: This function uses a simple iterative approach to compare arrays. It's straightforward, but may not be the fastest option for very large arrays.
	+ Pros: Easy to understand, minimal dependencies.
	+ Cons: May not perform well on large datasets.
* **Lodash `difference`**: This function also uses an iterative approach, but it's a bit more complex than `isEqual`. It returns two arrays, one with elements present in both input arrays and another with elements that are unique to each array.
	+ Pros: Can return multiple results at once, which might be useful for some use cases.
	+ Cons: More complex implementation, may have higher overhead due to the additional return value.

**Lodash Library**

The Lodash library is a popular JavaScript utility library that provides a wide range of functions for various tasks, such as:

* Array manipulation (e.g., `map`, `filter`, `reduce`)
* String manipulation (e.g., `trim`, `repeat`)
* Object manipulation (e.g., `pick`, `omit`)
* Math and statistical functions (e.g., `mean`, `median`)

In this benchmark, Lodash is used to provide the `isEqual` and `difference` functions.

**Special JavaScript Features/Syntax**

There are no special JavaScript features or syntax mentioned in the benchmark definition. The code uses standard JavaScript arrays (`window.foo1` and `window.bar1`) and the Lodash library's `_.isEqual` and `_.difference` functions.

**Other Alternatives**

If you're looking for alternative libraries or implementations of array comparison functions, some options include:

* **Underscore.js**: A popular JavaScript utility library that provides similar functions to Lodash.
* **Array.prototype.every()` and `Array.prototype.some()`: Built-in JavaScript methods that can be used to compare arrays element-wise. However, these methods have different behavior than `isEqual` and `difference`.
* **Custom implementations**: You could also write your own custom function for comparing arrays, but this would likely require more code and potentially less performance.

Overall, the benchmark is testing the performance of two specific functions from Lodash (`isEqual` and `difference`) against each other. The results can help users understand which function might be more suitable for their use cases, depending on factors like array size and desired output.

Latest run results:

Run details: (Test run date: 5 months ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0.0.0 Safari/537.36

Browser/OS: Chrome 125 on Windows

View result in a separate tab

Test name	Executions per second
_.isEqual	2540053.0 Ops/sec
_.difference	1572527.2 Ops/sec

Related benchmarks:

Lodash isEqual vs Lodash difference (version: 0)

Test on isEqual bs difference performance

Comparing performance of: _.isEqual vs _.difference

Created: 5 years ago by: Guest

Jump to the latest result

_.isEqual

_.difference

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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