Benchmark: ID vs Data vs Class 2

HTML Preparation code:

<script
  src="https://code.jquery.com/jquery-3.2.1.slim.min.js"
  integrity="sha256-k2WSCIexGzOj3Euiig+TlR8gA0EmPjuc79OEeY5L45g="
  crossorigin="anonymous"></script>
<div id="test" data-test="test" class="testing">Testing</div>

Tests:

ID
$('#test').show();
Data
$('[data-test="test"]').show();
class
$('.testing').show();
ID vanilla
document.getElementById("test");
class vanilla
document.getElementsByClassName("testing");
querySelector Attribute
document.querySelector('[data-test="test"]');
querySelector ID
document.querySelector('test');
querySelector Class
document.querySelector('.testing');

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
ID
Data
class
ID vanilla
class vanilla
querySelector Attribute
querySelector ID
querySelector Class

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 27 days ago):

LLMs can make mistakes. Check important info.

Let's break down the benchmark and its various test cases.

**Benchmark Purpose:**

The benchmark measures the performance of different approaches to select an HTML element on a webpage using JavaScript.

**Options Compared:**

1. **ID**: Using the `id` attribute to select an element, e.g., `$('#test').show();`
2. **Data**: Using the `data-test` attribute to select an element, e.g., `('[data-test="test"]').show();`
3. **Class**: Using the `class` attribute to select an element, e.g., `$('.testing').show();`
4. **Vanilla ID**: Using only the `id` attribute without jQuery (e.g., `document.getElementById("test");`)
5. **Vanilla Class**: Using only the `class` attribute without jQuery (e.g., `document.getElementsByClassName("testing");`)
6. **querySelector Attribute**: Using the `querySelector` method with an attribute selector, e.g., `document.querySelector('[data-test="test"]');`
7. **querySelector ID**: Using the `querySelector` method with an ID selector, e.g., `document.querySelector('test');`
8. **querySelector Class**: Using the `querySelector` method with a class selector, e.g., `document.querySelector('.testing');`

**Pros and Cons:**

* **ID**:
	+ Pros: Fastest way to select elements by ID.
	+ Cons: May not work if multiple elements have the same ID (which is generally discouraged).
* **Data**:
	+ Pros: Works even if multiple elements have the same data-test attribute value.
	+ Cons: May be slower than using IDs, as it requires a DOM lookup.
* **Class**:
	+ Pros: Works for elements with multiple class attributes.
	+ Cons: May be slower than using IDs or data-test attributes.
* **Vanilla ID**: Pros: Lightweight and fast. Cons: Requires manual DOM manipulation to find the element by ID.
* **Vanilla Class**: Pros: Lightweight and fast. Cons: Requires manual DOM manipulation to get an array of matching elements, which can be slow.
* **querySelector Attribute**:
	+ Pros: Flexible and efficient way to select elements using attributes.
	+ Cons: May be slower than native attribute-based selectors (e.g., `getElementById`).
* **querySelector ID**: Pros: Fast and efficient. Cons: Limited flexibility compared to querySelectorAttribute.
* **querySelector Class**:
	+ Pros: Flexible and efficient way to select elements by class.
	+ Cons: May be slower than using IDs.

**Other Considerations:**

* The use of jQuery and its methods (e.g., `$('#test').show();`) introduces an additional overhead due to the library's complexity and performance requirements.
* The benchmark results are likely skewed by the browser's caching behavior, which can impact performance when running multiple iterations with the same input.

**Alternatives:**

1. Using native attribute-based selectors (e.g., `document.getElementById`, `document.getElementsByClassName`) without jQuery.
2. Implementing custom attribute-based selectors or using a library like Sizzle or CSS Selectors for more efficient element selection.
3. Using a different HTML structure, such as using IDs and classes in a more optimal way to reduce the number of elements with multiple attributes.

In summary, the benchmark highlights the importance of considering performance, flexibility, and maintainability when selecting HTML elements on a webpage.

Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36

Browser/OS: Chrome 108 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
ID	357051.5 Ops/sec
Data	205567.5 Ops/sec
class	260553.1 Ops/sec
ID vanilla	4634798.0 Ops/sec
class vanilla	4284235.0 Ops/sec
querySelector Attribute	2123357.2 Ops/sec
querySelector ID	2712899.5 Ops/sec
querySelector Class	3134351.2 Ops/sec

Related benchmarks:

ID vs Data vs Class 2 (version: 0)

Comparing performance of: ID vs Data vs class vs ID vanilla vs class vanilla vs querySelector Attribute vs querySelector ID vs querySelector Class

Created: one year ago by: Guest

Jump to the latest result

ID

Data

class

ID vanilla

class vanilla

querySelector Attribute

querySelector ID

querySelector Class

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 27 days ago):