Benchmark: array length vs. lodash isEmpty

HTML Preparation code:

<script src="https://cdn.jsdelivr.net/npm/lodash@4.17.21/lodash.min.js" integrity="sha256-qXBd/EfAdjOA2FGrGAG+b3YBn2tn5A6bhz+LSgYD96k=" crossorigin="anonymous"></script>

Tests:

lodash
_.isEmpty([])
native
Array.isArray([]) && [].length > 0

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
lodash
native

Fastest: N/A

Slowest: N/A

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

LLMs can make mistakes. Check important info.

I'll break down the provided benchmark definition, test cases, and latest benchmark results to explain what's being tested.

**Benchmark Definition:**

The benchmark is designed to compare two approaches for checking if an array is empty:

1. Using Lodash (`_isEmpty([])`): This method checks if the input array is empty by verifying that its length is 0.
2. Native JavaScript implementation (`Array.isArray([]) && [].length > 0`): This approach uses the `Array.isArray()` function to check if the input is an array, and then checks if the array's length is greater than 0.

**Options Compared:**

The two options are compared in terms of their execution performance. The benchmark measures how many executions per second each option can handle on a given system.

**Pros and Cons:**

1. **Lodash (`_isEmpty([])`)**:
	* Pros:
		+ Convenient and readable syntax.
		+ No need to implement the `Array.isArray()` check manually.
	* Cons:
		+ Requires Lodash library to be loaded, which might add overhead.
2. **Native JavaScript implementation (`Array.isArray([]) && [].length > 0`)**:
	* Pros:
		+ Only uses built-in functions, avoiding potential library overhead.
		+ Can be optimized for better performance by removing unnecessary checks.
	* Cons:
		+ Requires manual implementation of the `Array.isArray()` check.

**Library and its Purpose:**

Lodash is a popular utility library that provides various functions for tasks like array manipulation, string processing, and more. In this benchmark, Lodash's `_isEmpty` function is used to check if an input array is empty.

**Special JS Feature or Syntax:**

There are no special JavaScript features or syntaxes mentioned in the provided information. However, it's worth noting that some JavaScript engines might optimize certain functions or syntaxes for better performance.

**Other Alternatives:**

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

1. Using `length` property directly on the array (`[].length === 0`).
2. Using `Object.keys()` and checking if the result is an empty array (`Object.keys([]).length === 0`).
3. Implementing a custom function using bitwise operations (e.g., `(!array.length && !Array.isArray(array))`) for better performance.

Keep in mind that these alternatives might have different performance characteristics or be more suitable for specific use cases.

Related benchmarks:

array length vs. lodash isEmpty (version: 0)

Comparing performance of: lodash vs native

Created: 3 years ago by: Guest

Jump to the latest result

lodash

native

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):