Benchmark: Updating Classes v1 + jQuery

HTML Preparation code:

<script src="https://code.jquery.com/jquery-3.3.1.min.js"></script>
<div class="new-page-container"><p id="superID">Hello World</p></div>

Script Preparation code:

document.getElementById("superID").className = "";

Tests:

setAttribute
document.getElementById("superID").setAttribute('class', 'test');
className
document.getElementById("superID").className = "test";
classList-Add
document.getElementById("superID").classList.add("test");
jQuery addClass
$("#superID").addClass("test");

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
setAttribute
className
classList-Add
jQuery addClass

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 28 days ago):

LLMs can make mistakes. Check important info.

Let's break down what is being tested in this JavaScript microbenchmark:

**Benchmark Overview**

The benchmark measures the performance of updating the `className` property of an HTML element, compared to three alternative approaches: setting the attribute directly using `setAttribute`, adding to the class list using `classList.add()`, and using jQuery's `addClass()` method.

**Options Compared**

1. **Setting the attribute directly**: This approach involves calling `document.getElementById("superID").setAttribute('class', 'test');`. The pros of this approach are that it is language-agnostic, meaning it works in any JavaScript engine or environment without requiring additional libraries. However, setting an attribute using `setAttribute()` can be slower than other methods because it involves creating a new DOM attribute.
2. **Adding to the class list**: This approach involves calling `document.getElementById("superID").classList.add('test');`. The pros of this approach are that it is more efficient and faster than setting the attribute directly, as it leverages the browser's built-in support for CSS classes (class lists). However, this method may not work in older browsers or those with strict security policies.
3. **Using jQuery's `addClass()` method**: This approach involves calling `$("#superID").addClass("test");`. The pros of this approach are that it is a convenient and widely supported way to update class names in many web applications. However, using an external library like jQuery can add overhead and introduce dependencies.

**Pros and Cons**

* **Setting the attribute directly**: Pros - language-agnostic; Cons - slower due to DOM attribute creation.
* **Adding to the class list**: Pros - faster and more efficient; Cons - may not work in older browsers or with strict security policies.
* **Using jQuery's `addClass()` method**: Pros - convenient and widely supported; Cons - introduces external library dependency and overhead.

**Library Used**

The benchmark uses jQuery, a popular JavaScript library for DOM manipulation, event handling, and other tasks. In this case, the `addClass()` method is used to update the class name of the HTML element.

**Special JS Feature or Syntax**

There are no special JavaScript features or syntaxes being tested in this benchmark, but it does rely on built-in browser support for CSS classes (class lists).

**Other Alternatives**

If you want to test alternative approaches, some options could be:

* Using a different library like React's `className` method or Ember's `addClassClass` method.
* Implementing your own class management system using JavaScript objects and arrays.
* Testing the performance of setting attributes directly using other methods, such as `setAttribute('class', 'test')`, instead of using `classList.add()`.

Keep in mind that each alternative approach may have its own trade-offs and pros/cons, which would need to be carefully evaluated for optimal performance.

Latest run results:

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

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/84.0.4147.105 Safari/537.36

Browser/OS: Chrome 84 on Windows

View result in a separate tab

Test name	Executions per second
setAttribute	898515.1 Ops/sec
className	1178683.6 Ops/sec
classList-Add	906367.9 Ops/sec
jQuery addClass	400148.6 Ops/sec

Related benchmarks:

Updating Classes v1 + jQuery (version: 0)

comparing the 4 Titans

Comparing performance of: setAttribute vs className vs classList-Add vs jQuery addClass

Created: 6 years ago by: Guest

Jump to the latest result

setAttribute

className

classList-Add

jQuery addClass

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 28 days ago):