Benchmark: native findIndex vs lodash findIndex

HTML Preparation code:

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

Script Preparation code:

var users = [
  { 'user': 'joey',  'age': 28 },
  { 'user': 'ross',    'age': 31 },
  { 'user': 'chandler', 'age': 30 },
  { 'user': 'jessika', 'age': 21 },
  { 'user': 'amanda', 'age': 17 }
]

Tests:

Native findIndex
users.findIndex(u => u.age === 30)
_.findIndex
_.findIndex(users, u => u.age === 30)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Native findIndex
_.findIndex

Fastest: N/A

Slowest: N/A

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

LLMs can make mistakes. Check important info.

I'll break down the provided benchmark definition and explain what's being tested, compared, and their pros and cons.

**Benchmark Overview**

The provided JSON represents a JavaScript microbenchmark that compares the performance of two methods: `native findIndex` (using JavaScript's built-in array method) and `_.findIndex` (from the Lodash library).

**What's being compared?**

The benchmark is comparing the performance of:

1. **Native findIndex**: This uses JavaScript's built-in `findIndex` method, which searches for the first element in an array that satisfies a given condition.
2. **_findIndex_ (Lodash)**: This uses the `_findIndex` method from Lodash, a popular utility library for functional programming.

**Options and their pros and cons**

Both methods are designed to find the index of the first element in an array that meets a certain condition. Here's a brief overview:

* **Native findIndex**: Pros:
	+ Fast and efficient, since it's implemented in native code.
	+ Only depends on JavaScript's built-in functionality, making it a good choice for projects that want to minimize dependencies.
* Cons:
	+ Can be slower than other methods if the array is very large or if the condition is complex.
	+ May have issues with edge cases (e.g., empty arrays) unless implemented carefully.
* **_findIndex_(Lodash)**: Pros:
	+ Easy to use and maintain, thanks to Lodash's extensive documentation and API.
	+ Can be faster than native findIndex for certain scenarios, such as when dealing with large arrays or complex conditions.
* Cons:
	+ Requires the Lodash library to be included in your project, which can add dependencies and potentially increase bundle size.
	+ May have slower performance compared to native findIndex if the array is very large.

**Library: _findIndex_ (Lodash)**

The `_findIndex` method from Lodash is a convenient wrapper around JavaScript's built-in `findIndex` method. It provides additional features, such as:

* Support for more advanced conditions and callbacks
* Optional second argument to specify the index to return if no element matches the condition
* Built-in handling for edge cases (e.g., empty arrays)

Lodash is a popular utility library that helps developers simplify common tasks in JavaScript. Its `_findIndex` method is particularly useful when working with large datasets or complex conditions.

**Special JS feature: None**

There are no special JavaScript features or syntax used in this benchmark. Both `native findIndex` and `_findIndex_ (Lodash)` rely on standard JavaScript functionality.

**Other alternatives**

If you need to compare the performance of other array methods, consider exploring:

* **Array.prototype.findIndex()**: Similar to native findIndex, but without the native implementation.
* **_.findIndex(underscore)**: Another Lodash method that provides similar functionality to _.findIndex.
* **Other libraries or frameworks**: Depending on your specific use case, you may want to explore other libraries or frameworks that provide array methods with improved performance or features.

In summary, this benchmark compares the performance of two methods for finding the index of the first element in an array that meets a certain condition: native JavaScript's `findIndex` method and Lodash's `_findIndex_`. The choice between these options depends on your project's requirements, such as dependencies, performance needs, and ease of use.

Latest run results:

Run details: (Test run date: 6 days ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/129.0.0.0 Safari/537.36

Browser/OS: Chrome 129 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
Native findIndex	20050362.0 Ops/sec
_.findIndex	10127565.0 Ops/sec

Related benchmarks:

native findIndex vs lodash findIndex (version: 0)

Compare performance of native [].findIndex and _.findIndex

Comparing performance of: Native findIndex vs _.findIndex

Created: 4 years ago by: Guest

Jump to the latest result

Native findIndex

_.findIndex

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):