Benchmark: Lodash IsEmpty - MeasureThat.net

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)
lenght
var a = arr?.lenght === 0

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
_.isEmpty
lenght

Fastest: N/A

Slowest: N/A

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

LLMs can make mistakes. Check important info.

Let's break down the provided JSON benchmark and explain what's being tested.

**What is being tested?**

The provided JSON benchmark tests two different ways to check if an array is empty using JavaScript.

1. The first test case uses Lodash, a popular utility library for functional programming in JavaScript. It checks if the `_.isEmpty(arr)` method returns `true` when called with an array `arr`.
2. The second test case uses a more modern syntax introduced in ECMAScript 2020 (ES2020): the nullish coalescing operator (`??`) and the length property of arrays.

**Options compared:**

The two options being compared are:

1. Lodash's `_.isEmpty(arr)` method
2. Using the nullish coalescing operator (`??`) with array length comparison (`arr?.length === 0`)

**Pros and Cons:**

**Lodash's `_.isEmpty(arr)` method:**

Pros:

* Well-established library with a large community of users and contributors.
* Provides a concise way to check if an object is empty, including arrays.

Cons:

* Requires including the Lodash library in the test case, which adds overhead due to bundle size and load time.
* May not be the most efficient solution for performance-critical code.

**Nullish Coalescing Operator (`??`) with array length comparison:**

Pros:

* Does not require including any external libraries or dependencies.
* Is a native JavaScript feature, making it more likely to be supported in all browsers and environments.

Cons:

* Requires knowledge of the new syntax introduced in ES2020, which may not be familiar to all developers.
* May be slightly less readable for some developers who are not accustomed to using this syntax.

**Other considerations:**

When choosing between these two options, consider factors like code readability, performance, and maintenance. If you're writing new code and want to use a modern syntax, the nullish coalescing operator with array length comparison might be a better choice. However, if you need to support older browsers or environments that don't support this syntax, Lodash's `_.isEmpty(arr)` method might be a safer option.

**Library description:**

Lodash is a utility library for functional programming in JavaScript. It provides an extensive set of functions and methods for tasks like array manipulation, string manipulation, and more. The `_.isEmpty()` function is specifically designed to check if an object (including arrays) is empty or has no properties.

**Special JS feature or syntax:**

The nullish coalescing operator (`??`) was introduced in ECMAScript 2020 (ES2020). It allows you to provide a default value for a variable that might be `null` or `undefined`. In the context of this benchmark, it's used with array length comparison to create a concise and readable way to check if an array is empty.

**Alternatives:**

Other alternatives to Lodash's `_.isEmpty(arr)` method include:

* Using a simple loop to iterate over the array and check if its elements are all equal to `undefined`.
* Using a library like `Array.isEmpty()` or `is-empty()`, which provides similar functionality.
* Implementing your own custom implementation for checking if an array is empty.

Keep in mind that these alternatives might require more code and may not be as concise or readable as Lodash's `_.isEmpty(arr)` method.

Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/111.0.0.0 Safari/537.36

Browser/OS: Chrome 111 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
_.isEmpty	5390194.5 Ops/sec
lenght	22216416.0 Ops/sec

Related benchmarks:

Lodash IsEmpty (version: 0)

Comparing performance of: _.isEmpty vs lenght

Created: 3 years ago by: Guest

Jump to the latest result

_.isEmpty

lenght

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):