Benchmark: CLASS vs DATA - MeasureThat.net

HTML Preparation code:

<a href="#" class="class class-style js-class" data-action />

Tests:

CLASS
$('.js-class');
DATA
$('[data-action]');

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
CLASS
DATA

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 data and explain what's being tested.

**Benchmark Definition**

The benchmark definition is defined in two parts:

1. **Script Preparation Code**: This section is currently empty, which means that no code needs to be executed before running the test cases. In other words, the browser will start executing the test cases from scratch.
2. **Html Preparation Code**: The provided HTML code contains a single element with the class "js-class". This element is likely used as a trigger or a target for the tests.

**Individual Test Cases**

There are two test cases defined:

1. **CLASS**: This test case executes the JavaScript code `$('.js-class');`, which presumably targets the element with the class "js-class".
2. **DATA**: This test case executes the JavaScript code ` $('[data-action]');`, which searches for elements in the document that have a `data-action` attribute.

**Library and Purpose**

In both test cases, the library used is jQuery, a popular JavaScript library for DOM manipulation and event handling. The `$` function is used as an alias to access the Document Object Model (DOM) of the web page.

* In the **CLASS** test case, jQuery's `$.js-class` selector is used to target elements with the class "js-class". This allows the browser to find the target element and execute any subsequent code.
* In the **DATA** test case, jQuery's `[selector]` syntax is used to search for elements that have a `data-action` attribute. This allows the browser to find elements with this attribute and execute any subsequent code.

**Special JS Feature or Syntax**

There doesn't appear to be any special JavaScript features or syntax being tested in these benchmark cases. The tests are purely focused on measuring the execution time of jQuery's DOM manipulation functions.

**Other Alternatives**

If you wanted to write similar benchmarks, here are some alternatives:

1. Use a different JavaScript library, such as VanillaJS or Lodash, to perform the same operations.
2. Add more test cases that target different types of elements (e.g., IDs, tags, classes) or attributes.
3. Incorporate more complex scenarios, such as event handling or asynchronous code execution.
4. Test performance metrics other than `ExecutionsPerSecond`, such as the time it takes to render a specific element or perform a certain number of operations.

Some additional considerations:

* The benchmark's focus on jQuery-specific functions might not be representative of real-world web development scenarios, where developers often use more general-purpose libraries like VanillaJS.
* The test cases are relatively simple and don't account for various browser differences, caching mechanisms, or other factors that can affect performance.
* To make the benchmark more realistic, you could consider adding more complex HTML structures, multiple element selections, or asynchronous code execution.

Latest run results:

Run details: (Test run date: 2025 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_2) AppleWebKit/604.4.7 (KHTML, like Gecko) Version/11.0.2 Safari/604.4.7

Browser/OS: Safari 11 on Mac OS X 10.13.2

View result in a separate tab

Test name	Executions per second
CLASS	798198.2 Ops/sec
DATA	193214.8 Ops/sec

Related benchmarks:

CLASS vs DATA (version: 0)

Comparing performance of: CLASS vs DATA

Created: 6 years ago by: Guest

Jump to the latest result

CLASS

DATA

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):