Benchmark: jQuery vs vanilla JS in selector class

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js'></script>
<div>
  <ul>
    <li><a href="#" name="name" class="classname">item 1</a></li>
    <li><a href="#" name="name" class="classname">item 2</a></li>
    <li><a href="#" name="name" class="classname">item 3</a></li>
    <li><a href="#" name="name" class="classname">item 4</a></li>
    <li><a href="#" name="name" class="classname">item 5</a></li>
    <li><a href="#" name="name" class="classname">item 6</a></li>
    <li><a href="#" name="name" class="classname">item 7</a></li>
    <li><a href="#" name="name" class="classname">item 8</a></li>
    <li><a href="#" name="name" class="classname">item 9</a></li>
    <li><a href="#" name="name" class="classname">item 10</a></li>
  </ul>
</div>

Script Preparation code:

var nodes;

Tests:

getElementsByClassName
nodes = document.getElementsByClassName('classname');
querySelectorAll
nodes = document.querySelectorAll('.classname');
jQuery
nodes = $('.classname');

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
getElementsByClassName
querySelectorAll
jQuery

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 4 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.3945.130 Safari/537.36

Browser/OS: Chrome 79 on Mac OS X 10.15.3

View result in a separate tab

Test name	Executions per second
getElementsByClassName	2185729.5 Ops/sec
querySelectorAll	592210.8 Ops/sec
jQuery	325027.1 Ops/sec

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

LLMs can make mistakes. Check important info.

**Benchmark Explanation**

The provided benchmark measures the performance of three different methods for selecting elements with a specific class in HTML documents: `getElementsByClassName`, `querySelectorAll`, and jQuery's `$` function.

**Comparison Options**

1. **Vanilla JS (getElementsByClassName)**: This method uses the `document.getElementsByClassName()` API to retrieve all elements with the specified class name.
2. **Vanilla JS (querySelectorAll)**: This method uses the `document.querySelectorAll()` API to retrieve all elements with the specified CSS selector, which includes the class name.
3. **jQuery**: This method uses jQuery's `$` function to select elements with the specified class name.

**Pros and Cons**

* **getElementsByClassName**: Pros:
	+ Simple and straightforward
	+ Works well for older browsers that don't support `querySelectorAll`
	Cons:
	+ Returns a live HTMLCollection, which can be slower than other methods
	+ May not be suitable for use in modern web applications due to its limitations (e.g., it doesn't work with CSS selectors)
* **querySelectorAll**: Pros:
	+ More efficient and faster than `getElementsByClassName`
	+ Works well with CSS selectors, making it a good choice for modern web development
Cons:
	+ Requires support for the `querySelectorAll` API in the browser
* **jQuery**: Pros:
	+ Fast and efficient due to jQuery's caching and optimizing features
	+ Works well in older browsers that don't support `querySelectorAll`
Cons:
	+ Adds additional overhead due to the size of the jQuery library
	+ May not be suitable for use in smaller projects or applications with strict licensing requirements

**Library Description**

* **jQuery**: A popular JavaScript library for DOM manipulation and event handling. It provides a simple, intuitive API for selecting elements, manipulating their attributes, and attaching event listeners.

**Special JS Features/ Syntax**

None mentioned in the benchmark definition.

**Other Alternatives**

1. **Vanilla JS (querySelector)**: This method uses the `document.querySelector()` API to retrieve a single element that matches the specified CSS selector.
2. **Sizzle**: A CSS selector engine for JavaScript, which can be used as an alternative to jQuery's `$` function.
3. **CSSOM**: The CSS Object Model, which provides a way to manipulate and query CSS rules in a DOM-independent manner.

Note: These alternatives are not part of the benchmark definition, but they may be useful options to consider depending on your specific use case and requirements.

Related benchmarks:

jQuery vs vanilla JS in selector class (version: 0)

Comparing performance of: getElementsByClassName vs querySelectorAll vs jQuery

Created: 6 years ago by: Registered User

Jump to the latest result

getElementsByClassName

querySelectorAll

jQuery

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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