Benchmark: jQuery hasClass vs jQuery data

HTML Preparation code:

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<div id="el" class="test" data-slot='0'></div>

Tests:

jQuery hasClass
$("#el").hasClass("test");
jQuery data
$("#el").data('slot');

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
jQuery hasClass
jQuery data

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36

Browser/OS: Chrome 131 on Windows

View result in a separate tab

Test name	Executions per second
jQuery hasClass	2978059.8 Ops/sec
jQuery data	3707825.5 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the benchmark and its options.

**Benchmark Overview**

The benchmark measures the performance difference between two jQuery methods: `hasClass` and `data`. The test is designed to run in a web browser, using the jQuery library.

**Options Compared**

Two options are compared:

1. **jQuery `hasClass`**: This method checks if an element has a specific class.
2. **jQuery `data`**: This method sets or retrieves data associated with an element.

**Pros and Cons of Each Approach**

**jQuery `hasClass`**:

Pros:

* Faster, as it only needs to check the DOM property of the element (a simple lookup).
* More efficient, as it doesn't require parsing JSON or manipulating strings.

Cons:

* Only checks if the class exists; it doesn't return any additional information.
* May be slower in some cases due to browser caching and other factors.

**jQuery `data`**:

Pros:

* Returns the stored data value (if set).
* Can be useful for storing custom data with an element.

Cons:

* Slower, as it needs to parse JSON or manipulate strings to retrieve and store data.
* Requires more resources, as it needs to handle data serialization and deserialization.

**Library: jQuery**

jQuery is a popular JavaScript library that simplifies DOM manipulation and provides various utility functions. The `hasClass` and `data` methods are part of jQuery's core functionality.

**Special JS Feature or Syntax: None mentioned**

There are no special features or syntax used in this benchmark that require specific knowledge or expertise.

**Other Alternatives**

If you need to compare the performance of similar methods in other libraries, consider:

* Vanilla JavaScript (using `Element.classList.contains()` for `hasClass` and `Element.dataset` for `data`)
* Other jQuery alternatives like Lodash or Underscore.js
* Other JavaScript libraries that provide similar functionality, such as React or Angular

Keep in mind that the specific implementation and performance characteristics of these alternatives may vary from jQuery.

**Benchmark Preparation Code**

The script preparation code includes a single line:
```javascript
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
```
This loads the jQuery library, which is then used in both test cases.

**Html Preparation Code**

The HTML preparation code sets up an `<div>` element with an ID of "el" and a class of "test", as well as a `data-slot` attribute:
```html
<div id="el" class="test" data-slot='0'></div>
```
This element is used in both test cases to measure the performance of jQuery's `hasClass` and `data` methods.

Related benchmarks:

jQuery hasClass vs jQuery data (version: 0)

Comparing performance of: jQuery hasClass vs jQuery data

Created: 4 years ago by: Guest

Jump to the latest result

jQuery hasClass

jQuery data

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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