Benchmark: DataAttribute vs Class Selector vs ID Selectorssssss

HTML Preparation code:

<div class="hello" id="hello" data-hello="test">Hello</div>

Tests:

Class
document.querySelector('.hello');
ID
document.querySelector('#hello');
data attribute
document.querySelector('[data-hello]');
data attribute with text
document.querySelector('[data-hello="test"]');

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Class
ID
data attribute
data attribute with text

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated one month 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 is testing different ways to select elements in HTML using JavaScript. The test cases are:

1. `document.querySelector('.hello')`: Using class selectors
2. `document.querySelector('#hello')`: Using ID selectors
3. `document.querySelector('[data-hello]')`: Using data attributes (without specifying a value)
4. `document.querySelector('[data-hello="test"]')`: Using data attributes with a specific text value

**Options Compared**

The benchmark is comparing the performance of using class selectors, ID selectors, and data attributes to select elements in HTML.

**Pros and Cons**

* **Class Selectors**: Pros: widely supported, fast performance. Cons: may lead to conflicts if multiple classes are applied to an element.
* **ID Selectors**: Pros: unique identifier, fast performance. Cons: may not be as widely supported as class selectors, and can be slower than data attributes if there are many elements with the same ID.
* **Data Attributes**: Pros: flexible, efficient, and supports multiple values. Cons: may lead to issues if not properly handled, and some older browsers may not support it.

**Libraries and Special JS Features**

There doesn't appear to be any external libraries being used in this benchmark, but data attributes rely on the HTML5 specification, which is widely supported in modern browsers.

No special JavaScript features or syntax are mentioned in the provided information.

**Other Considerations**

The benchmark only tests basic element selection using these methods. Other factors that could affect performance, such as:

* DOM size and complexity
* Browser-specific optimizations or limitations
* Additional attributes or styles being applied to elements

**Alternatives**

If you're looking for alternatives to this benchmark, you might consider testing other aspects of HTML element manipulation, such as:

* Using `document.getElementById()` instead of `document.querySelector()`
* Testing the performance of different DOM traversal methods (e.g., `querySelectorAll()`, `getElementsByTagName()`)
* Evaluating the impact of CSS preprocessors or optimization techniques on element selection performance

Keep in mind that the specific alternatives will depend on your testing goals and requirements.

Latest run results:

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

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36

Browser/OS: Chrome 119 on Windows

View result in a separate tab

Test name	Executions per second
Class	4416641.0 Ops/sec
ID	2675042.5 Ops/sec
data attribute	2443761.2 Ops/sec
data attribute with text	2452141.5 Ops/sec

Related benchmarks:

DataAttribute vs Class Selector vs ID Selectorssssss (version: 0)

Comparing performance of: Class vs ID vs data attribute vs data attribute with text

Created: one year ago by: Guest

Jump to the latest result

Class

ID

data attribute

data attribute with text

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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