Benchmark: Comparing performance of native .length and Lodash _.isEmpty v2

HTML Preparation code:

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

Script Preparation code:

var isEmpty = obj => [Object, Array].includes((obj || {}).constructor) && !Object.entries((obj || {})).length;

Tests:

Lodash
_.isEmpty({})
Native
isEmpty({})

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Lodash
Native

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

This benchmark does not have any results yet. Be the first one to run it!

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 its results.

**Benchmark Overview**

The benchmark compares the performance of two approaches to check if an object is empty:

1. **Lodash**: Uses the `_.isEmpty` function from the Lodash library, which is a utility library for JavaScript that provides a lot of useful functions.
2. **Native**: Uses a custom implementation of the `isEmpty` function using the `includes` and `Object.entries` methods.

**Library: Lodash**

The Lodash library is a popular utility library for JavaScript that provides a wide range of functional programming helpers, including the `_.isEmpty` function. This function takes an object as input and returns `true` if the object is empty (i.e., has no own enumerable properties) and `false` otherwise.

In this benchmark, Lodash's `_.isEmpty` function is used to check if an object is empty. The benchmark runs this function on a sample object with no own enumerable properties (`{}`).

**Library: Native**

The native implementation of the `isEmpty` function uses the following approach:

* Checks if the object's constructor is in the array `[Object, Array]`. This is because both objects and arrays have a defined length.
* If the object has an empty constructor, it then checks if there are any own enumerable properties on the object using `Object.entries`.

The native implementation aims to provide a lightweight alternative to Lodash's `_.isEmpty` function.

**Comparison of Approaches**

Here's a pros-and-cons analysis of both approaches:

1. **Lodash (.isEmpty)**:
	* Pros:
		+ Widely adopted and well-tested.
		+ Provides additional functionality beyond just checking if an object is empty (e.g., it can handle nested objects).
	* Cons:
		+ Adds dependency on the Lodash library, which may not be desirable in all cases.
2. **Native (isEmpty)**:
	* Pros:
		+ Lightweight and self-contained.
		+ Does not add external dependencies.
	* Cons:
		+ May be less readable or maintainable due to its custom implementation.

**Results**

The benchmark results show the execution time for each approach on a sample object with no own enumerable properties:

1. **Lodash**:
	* Execution time: 5204165.0 executions per second.
2. **Native**:
	* Execution time: 1859394.25 executions per second.

These results indicate that Lodash's `_.isEmpty` function is significantly faster than the native implementation of the `isEmpty` function.

**Special JS Feature/Syntax**

None in this benchmark.

**Alternatives**

If you're looking for alternative implementations or libraries to check if an object is empty, here are a few options:

* **Array.prototype.isEmpty**: In modern JavaScript environments (ECMAScript 2015+), you can use the `isEmpty` method on arrays, which checks if the array has zero length. This approach is similar to Lodash's `_.isEmpty`, but it only works on arrays.
* **Object.keys().length == 0**: You can also use this approach by checking if the number of keys in an object using `Object.keys()` is equal to 0.

Keep in mind that these alternatives may not be as efficient or readable as Lodash's `_.isEmpty` function.

Related benchmarks:

Comparing performance of native .length and Lodash _.isEmpty v2 (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):