Benchmark: Lodash.isArray vs Array.isArray (Lodash v4.17.15)

HTML Preparation code:

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

Script Preparation code:

function getRandomInt(max) {
  return Math.floor(Math.random() * Math.floor(max));
}

var arr = [];
for(var i = 0; i < 5000; i++){
  arr.push({value:getRandomInt(100)});
}

Tests:

lodash isArray
_.isArray(arr);
Array isArray Array.isArray(arr) Array.isArray(a
Array.isArray(arr)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
lodash isArray
Array isArray Array.isArray(arr) Array.isArray(a

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 25 days ago):

LLMs can make mistakes. Check important info.

Let's dive into the world of microbenchmarks on MeasureThat.net.

The benchmark in question is testing two approaches to check if an object is an array: the native `Array.isArray()` method and the Lodash library's `_.isArray()` function.

**Native Approach (Array.isArray())**

The native approach uses the built-in `Array.isArray()` method, which is a part of the JavaScript language specification. This method takes an object as input and returns a boolean value indicating whether the object is an array.

Pros:

* Native implementation: It's the built-in method provided by the JavaScript engine, so it's likely to be highly optimized.
* Simple and concise: The code is short and easy to read.
* Platform-agnostic: Since it's part of the language specification, it should work across different browsers and platforms without any issues.

Cons:

* Limited understanding: Some developers might not be familiar with this method, which could lead to misunderstandings about its behavior or limitations.

**Lodash Approach (_.isArray())**

The Lodash library provides a function called `_.isArray()` that takes an object as input and returns a boolean value indicating whether the object is an array. This function is part of the Lodash utility belt, which offers a wide range of functional programming helpers.

Pros:

* Consistent behavior: Lodash's implementation ensures consistent results across different environments, making it easier to understand and rely on.
* Community-driven development: Lodash is actively maintained by its community, ensuring that any issues or bugs are quickly addressed.
* Comprehensive documentation: The Lodash library provides excellent documentation, including examples and usage guides.

Cons:

* Additional dependency: To use this approach, you need to include the Lodash library in your project, which might add extra overhead or complexity.
* Polished API: While the `_.isArray()` function is well-documented, its implementation can be slightly different from the native method's behavior.

**Library and Its Purpose**

The Lodash library provides a wide range of utility functions for functional programming, data manipulation, and more. In this case, `_.isArray()` serves as a concise way to check if an object is an array without having to write custom code or rely on browser-specific methods.

**Special JavaScript Feature or Syntax**

There isn't any special JavaScript feature or syntax being tested in this benchmark. The focus is solely on comparing the performance of two approaches: the native `Array.isArray()` method and the Lodash library's `_.isArray()` function.

**Other Alternatives**

If you're looking for alternative ways to check if an object is an array, here are a few options:

1. **Array.prototype instanceof Array**: This approach uses the `instanceof` operator to check if an object is an instance of the `Array` constructor.
2. **Array.isArray-like objects**: Some browsers provide a way to create array-like objects using the `Symbol.iterator` method or by implementing the `length` property. These approaches might be faster than native `Array.isArray()` but are less reliable and more platform-specific.

Overall, this benchmark highlights the importance of performance optimization in JavaScript development. By comparing the execution times of two approaches, developers can gain insight into the best ways to optimize their code for specific use cases.

Latest run results:

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

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.0.0 Safari/537.36

Browser/OS: Chrome 116 on Windows

View result in a separate tab

Test name	Executions per second
lodash isArray	2527995.2 Ops/sec
Array isArray Array.isArray(arr) Array.isArray(a	2706735.2 Ops/sec

Related benchmarks:

Lodash.isArray vs Array.isArray (Lodash v4.17.15) (version: 0)

Lodash version 4.17.15

Comparing performance of: lodash isArray vs Array isArray Array.isArray(arr) Array.isArray(a

Created: one year ago by: Guest

Jump to the latest result

lodash isArray

Array isArray Array.isArray(arr) Array.isArray(a

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 25 days ago):