Benchmark: Lodash IsEmpty Test

HTML Preparation code:

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

Script Preparation code:

var arr = ['a', 'b', 'c'];

Tests:

_.isEmpty
var a = _.isEmpty(arr)
length
var a = arr?.length === 0

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
_.isEmpty
length

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 26 days ago):

LLMs can make mistakes. Check important info.

I'd be happy to help explain the JavaScript microbenchmark on MeasureThat.net.

**Overview**

The benchmark measures the performance of two different ways to check if an array is empty in JavaScript:

1. Using the `_.isEmpty` function from the Lodash library
2. Using a simple conditional statement `arr?.length === 0`

**Lodash `.isEmpty` function**

The Lodash library provides several utility functions, including `_.isEmpty`, which checks if a value is an empty object, array, or string.

In this benchmark, the test case uses `_.isEmpty(arr)` to check if the input array `arr` is empty. This approach is often used in functional programming and can be more concise than writing a custom implementation.

Pros:

* Concise and readable code
* Reduces duplication of boilerplate code

Cons:

* Requires including an external library (Lodash) which adds overhead
* May not be suitable for all use cases where the function needs to perform additional operations

**Simple Conditional Statement**

The second test case uses a simple conditional statement `arr?.length === 0` to check if the input array `arr` is empty. This approach is more straightforward and doesn't require any external libraries.

Pros:

* Lightweight and easy to understand
* No additional dependencies required

Cons:

* May be less concise than using a library function like `_isEmpty`
* Requires explicit null checking with `?.length`

**Other Considerations**

Both approaches have their trade-offs. If you prioritize readability and conciseness, the Lodash `.isEmpty` function might be a good choice. However, if you're working on a project where performance is critical or you need more control over the implementation, the simple conditional statement might be a better fit.

**Alternatives**

Other alternatives to check if an array is empty in JavaScript include:

1. Using `Array.prototype.length === 0` directly on the array
2. Implementing a custom `isEmpty` function using a simple loop or recursive approach

However, these approaches may not be as concise or readable as the Lodash `.isEmpty` function or the simple conditional statement.

**Special JS Features and Syntax**

In this benchmark, there are no special JavaScript features or syntax that need to be explained. The code uses standard JavaScript syntax and doesn't require any advanced features like async/await, Promises, or modern ECMAScript syntax (ES6+).

Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/97.0.4692.99 Safari/537.36

Browser/OS: Chrome 97 on Windows

View result in a separate tab

Test name	Executions per second
_.isEmpty	3882717.2 Ops/sec
length	14925851.0 Ops/sec

Related benchmarks:

Lodash IsEmpty Test (version: 0)

Comparing performance of: _.isEmpty vs length

Created: 2 years ago by: Guest

Jump to the latest result

_.isEmpty

length

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 26 days ago):