Benchmark: class selector - MeasureThat.net

HTML Preparation code:

<div class="test22"></div>
<script src='https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js'></script>

Tests:

VanillaJS
document.getElementsByClassName('test22')[0];
Jquery
$('.test22')

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
VanillaJS
Jquery

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 26 days ago):

LLMs can make mistakes. Check important info.

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

**Benchmark Definition**

The benchmark is testing the performance of two different approaches to select an HTML element by its class name:

1. **VanillaJS**: The `document.getElementsByClassName('test22')[0];` approach, which uses the native JavaScript method to retrieve elements with a specific class name.
2. **Jquery**: The `$('.test22')` approach, which uses the jQuery library to select the same element.

**Options Compared**

The two approaches differ in the following aspects:

* **Libraries used**: VanillaJS relies solely on native JavaScript, while Jquery uses an external library to achieve the same result.
* **Syntax and semantics**: The syntax for both approaches is different. VanillaJS uses a more traditional method with `getElementsByClassName`, while Jquery uses a query language-like approach with `$()`.
* **Implementation details**: Jquery's implementation likely involves creating a DOM node tree and traversing it to find the matching element, whereas VanillaJS directly accesses the document's internal data structures.

**Pros and Cons**

Here are some pros and cons of each approach:

**VanillaJS:**

Pros:

* No external dependencies
* Native JavaScript performance is often optimized for performance-critical code paths
* Can be useful for educational purposes or when a lightweight solution is required

Cons:

* May require more explicit DOM manipulation
* Might not take advantage of browser-specific optimizations

**Jquery:**

Pros:

* High-level, query language-like syntax can simplify the selection process
* Often comes with additional features and methods that make it easier to work with elements
* Can provide better performance in some cases due to optimized internal algorithms

Cons:

* Adds an external dependency (the jQuery library)
* May introduce unnecessary overhead or bloat if not properly optimized
* Can lead to less direct control over the DOM tree for those unfamiliar with its inner workings.

**Other Considerations**

1. **Browser Support**: Both approaches should work across a wide range of browsers, but it's always good to test specific versions or edge cases.
2. **Security**: Be mindful of potential security vulnerabilities when using external libraries like jQuery.
3. **Readability and Maintainability**: Choose the approach that best aligns with your coding style and team preferences.

**Library (Jquery) and its Purpose**

jQuery is a popular JavaScript library that simplifies DOM manipulation, event handling, and other common web development tasks. It's designed to provide a more convenient, intuitive API for working with HTML elements. In this benchmark, jQuery is used to select the `test22` element by its class name.

**Special JS Features or Syntax**

This benchmark doesn't explicitly use any special JavaScript features or syntax that would require additional explanation. However, some edge cases might require consideration of browser-specific behavior or nuances in the selection process.

Latest run results:

Run details: (Test run date: 6 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36

Browser/OS: Chrome 69 on Windows

View result in a separate tab

Test name	Executions per second
VanillaJS	2709784.0 Ops/sec
Jquery	655501.2 Ops/sec

Related benchmarks:

class selector (version: 0)

Comparing performance of: VanillaJS vs Jquery

Created: 6 years ago by: Guest

Jump to the latest result

VanillaJS

Jquery

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 26 days ago):