Benchmark: jQuery by className vs Document.getElementsByClassName

HTML Preparation code:

<script type="text/javascript" src="http://ajax.aspnetcdn.com/ajax/jQuery/jquery-3.1.0.min.js"></script>
<div class="testElement"></div>

Tests:

jQuery
var el = $(".testElement")[0]; var className = el.className;
Vanilla JS
var el = document.getElementsByClassName('testElement'); var className = el.className;

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
jQuery
Vanilla JS

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:148.0) Gecko/20100101 Firefox/148.0

Browser/OS: Firefox 148 on Windows

View result in a separate tab

Test name	Executions per second
jQuery	683112.1 Ops/sec
Vanilla JS	1321787.6 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 explain what's being tested.

**Benchmark Overview**

The test compares the performance of two approaches to get an element by class name:

1. **jQuery**: Using jQuery's `$()` function to select elements with a specific class name.
2. **Vanilla JS**: Using `document.getElementsByClassName()` method to get all elements with a specific class name and then accessing the first element.

**Options Compared**

The benchmark compares the performance of two approaches: jQuery and Vanilla JS.

**Pros and Cons of Each Approach**

1. **jQuery**
	* Pros:
		+ Easier to use, especially for complex selections.
		+ Provides a more convenient way to get elements by class name.
	* Cons:
		+ Requires including the jQuery library, which can add overhead.
		+ May not be as efficient as the Vanilla JS approach.
2. **Vanilla JS**
	* Pros:
		+ No additional libraries are required.
		+ Can be more efficient than jQuery for simple selections.
	* Cons:
		+ Requires manual parsing of class names to get elements.

**Library: jQuery**

jQuery is a popular JavaScript library that simplifies DOM manipulation and provides a convenient way to select elements. In this benchmark, we're using the `jquery-3.1.0.min.js` version. The `$(selector)` function is used to select elements by their class name, which can be more efficient than using `document.getElementsByClassName()`.

**Special JS Feature/Syntax: None**

There are no special JavaScript features or syntaxes being tested in this benchmark.

**Other Alternatives**

If you're looking for alternative approaches to get elements by class name, you could consider:

* Using `document.querySelectorAll()`, which returns a NodeList of all elements that match the selector.
* Creating a custom function using `Element.prototype.querySelector` and `Element.prototype.classList.contains`.
* Using a library like Lodash, which provides functions like `_.getElementsByClass()`.

Keep in mind that these alternatives might not provide the same level of convenience as jQuery or Vanilla JS, but can be useful in specific situations.

Related benchmarks:

jQuery by className vs Document.getElementsByClassName (version: 0)

Comparing speed of getting element by class name with jQuery vs Vanilla JS

Comparing performance of: jQuery vs Vanilla JS

Created: 8 years ago by: Guest

Jump to the latest result

jQuery

Vanilla JS

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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