Benchmark: Lodash IsEmpty vs Object.keys().length for checking if object has content

HTML Preparation code:

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

Script Preparation code:

var testObjEmpty = {};
var testObjFull = {
    a: 1,
    b: null,
    c: 'c',
    d: [1, 2, 3],
    e: false
};

Tests:

_.isEmpty
_.isEmpty(testObjEmpty) _.isEmpty(testObjFull)
Object.keys().length
Object.keys(testObjEmpty).length Object.keys(testObjFull).length

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
_.isEmpty
Object.keys().length

Fastest: N/A

Slowest: N/A

Latest run results:

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

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

**Benchmark Overview**

The benchmark compares two approaches to check if an object has content: using Lodash's `isEmpty` function and using the `Object.keys().length` property.

**Lodash `isEmpty` Function**

* The Lodash `isEmpty` function checks if an object is empty by returning a boolean value indicating whether the object has no properties.
* The `_.isEmpty(testObjEmpty)` line creates an empty object `testObjEmpty` and passes it to the `isEmpty` function to test its behavior.
* The `_._isEmpty(testObjFull)` line creates a non-empty object `testObjFull` (with some null, string, and array values) and passes it to the `isEmpty` function to test its behavior.

**Object.keys().length Property**

* This property returns the number of enumerable properties in an object.
* The lines `Object.keys(testObjEmpty).length` and `Object.keys(testObjFull).length` create the same objects as above and measure the execution time it takes to execute this expression.

**Pros and Cons**

Using Lodash's `isEmpty` function has a few advantages:

* It provides a clear and concise way to check if an object is empty.
* It can be used in combination with other Lodash functions for more complex object manipulation.

However, using the `Object.keys().length` property also has its own set of benefits:

* It's a built-in JavaScript function that doesn't require additional libraries or dependencies.
* It provides direct access to an object's properties without relying on external libraries.

On the other hand, using Lodash's `isEmpty` function can be considered a drawback if you:

* Need fine-grained control over your benchmarking results (Lodash returns a boolean value).
* Don't want to add additional dependency to your project (Lodash needs to be included explicitly).

**Other Considerations**

Both approaches assume that the object being tested has non-empty values. If an object might be empty, you should consider using other methods, such as checking if a property exists (`in` operator) or using `Object.getOwnPropertyNames()`.

**Library and Special JS Feature/ Syntax**

* Lodash is a popular JavaScript utility library that provides various helper functions for tasks like array manipulation, string manipulation, and object transformation.
* The `_.isEmpty` function relies on the `length` property of arrays, which returns the number of elements in an array. This property only works with arrays, not objects.

**Other Alternatives**

If you're looking to create your own benchmarks or need alternative approaches for checking if an object has content, consider using:

* Using the `in` operator (`"key" in obj`) to check if a key exists in an object.
* Using `Object.getOwnPropertyNames()` (or `Object.getOwnPropertyDescriptors()`) to get an array of all enumerable properties in an object.

These alternatives can provide more control over your benchmarking results, but may require more effort to implement.

Related benchmarks:

Lodash IsEmpty vs Object.keys().length for checking if object has content (version: 0)

Comparing performance of: _.isEmpty vs Object.keys().length

Created: 3 years ago by: Guest

Jump to the latest result

_.isEmpty

Object.keys().length

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):