Benchmark: Lodash.isArray vs Array.isArray 2024

HTML Preparation code:


<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.21/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)

Historical Performance Data aggregated from 5 community runs

Desktop Results:

Chrome 5 runs

Array isArray

132.4M/s

lodash isArray

127.8M/s

View exact numbers

✓ Array isArray: 132,400,312 ops/sec
• lodash isArray: 127,777,952 ops/sec

Results show median performance across all community submissions. Run this benchmark yourself to verify on your device.

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
lodash isArray
Array isArray

Fastest: N/A

Slowest: N/A

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/132.0.0.0 Safari/537.36

Browser/OS: Chrome 132 on Windows

View result in a separate tab

Array isArray

137.8M/s

lodash isArray

127.8M/s

View exact numbers

Test name	Executions per second
✓ Array isArray	137,801,600 Ops/sec
lodash isArray	127,777,952 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 benchmark and explain what's being tested.

**What is tested:**

The benchmark is testing two approaches to check if an array is an array:

1. **`_.isArray(arr)`**: This uses the `Lodash` library, specifically the `_isArray` function, to check if the `arr` variable is an array.
2. **`Array.isArray(arr)`**: This is a built-in JavaScript method that checks if the `arr` variable is an array.

**Options compared:**

The benchmark is comparing the performance of these two approaches:

* `_.isArray(arr)`: Using Lodash's `_isArray` function
* `Array.isArray(arr)`: Built-in JavaScript method

**Pros and Cons:**

1. **`.isArray(arr)` using Lodash**:
	* Pros:
		+ Using a well-maintained and widely-used library (Lodash)
		+ Can provide additional functionality beyond just checking if an array is an array
	* Cons:
		+ Adds extra overhead due to the need to import and initialize the Lodash library
		+ May not be as efficient as the built-in JavaScript method
2. **`Array.isArray(arr)`**:
	* Pros:
		+ No additional overhead or dependencies (just the built-in JavaScript method)
		+ Efficient and lightweight
	* Cons:
		+ Only checks if an array is an array, without providing any additional functionality

**Library:**

The Lodash library is a popular utility library for JavaScript that provides a wide range of functions for tasks like array manipulation, string manipulation, and more. The `_isArray` function is specifically designed to check if a value is an array.

**Special JS feature or syntax:**

This benchmark does not use any special JavaScript features or syntax beyond the built-in `Array.isArray` method. It only uses standard JavaScript and Lodash library functions.

**Other alternatives:**

If you wanted to test other approaches, you could consider using:

* `typeof arr === 'object' && Array.isArray(arr)` (a more concise alternative to `_.isArray(arr)`)
* Using a different utility library or implementation (e.g., `is-array` or `checkarray`)
* Testing the performance of other array-related methods (e.g., `Array.prototype.every`, `Array.prototype.some`, etc.)

Keep in mind that these alternatives may have varying degrees of efficiency, readability, and maintainability compared to the original approach.

Lodash.isArray vs Array.isArray 2024 (version: 0)

Comparing performance of: `lodash isArray vs Array isArray`

Created: one year ago by: Guest

Go to the latest result

lodash isArray

Array isArray

Historical Performance Data aggregated from 5 community runs

Desktop Results:

Chrome 5 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

Lodash.isArray vs Array.isArray 2024 (version: 0)

Comparing performance of: lodash isArray vs Array isArray

Created: one year ago by: Guest

Go to the latest result

lodash isArray

Array isArray

Historical Performance Data aggregated from 5 community runs

Desktop Results:

Chrome 5 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

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Comparing performance of: `lodash isArray vs Array isArray`