Benchmark: SLEEK - Selector test 2

HTML Preparation code:

<div class="hello-world" id="hello-world--432" data-module="hellow-world">Hello</div>

Tests:

ID attribute
document.querySelector('[id^="hello-world--"]');
ID
document.querySelector('#hello-world--432');
Data attr
document.querySelector('[data-module="hello-world"]');
Class
document.querySelector('.hello-world');

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
ID attribute
ID
Data attr
Class

Fastest: N/A

Slowest: N/A

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

LLMs can make mistakes. Check important info.

**Benchmark Overview**

The provided benchmark measures the performance of JavaScript selectors on different browsers and devices. It tests four types of selector approaches: ID attribute, ID, class, and data attribute.

**Selector Approaches Compared**

1. **ID Attribute**: This approach uses the `^` symbol to match the `hello-world--` prefix in the ID.
	* Pros:
		+ Fast, as it only requires a single lookup in the DOM tree.
		+ Can be more efficient than other approaches for IDs with multiple words or special characters.
	* Cons:
		+ May not work correctly if the ID is modified or updated dynamically.
2. **ID**: This approach uses a direct reference to the element's ID, without any prefixing or suffixing.
	* Pros:
		+ Simple and easy to use.
	* Cons:
		+ May be slower than other approaches, especially for IDs with multiple words or special characters.
3. **Class**: This approach uses a direct reference to the class name, without any prefixing or suffixing.
	* Pros:
		+ Fast, as it only requires a single lookup in the DOM tree.
	* Cons:
		+ May not work correctly if the class is modified or updated dynamically.
4. **Data Attribute**: This approach uses a direct reference to the data attribute value, without any prefixing or suffixing.
	* Pros:
		+ Fast, as it only requires a single lookup in the DOM tree.
	* Cons:
		+ May not work correctly if the data attribute is modified or updated dynamically.

**Library and Special Features**

There are no libraries used in this benchmark. However, JavaScript does support some special features that may be relevant:

* **Template Literals**: The `Html Preparation Code` contains template literals (`<div class="hello-world" id="hello-world--432">`), which allow for more concise string interpolation.
* **Arrow Functions**: There are no arrow functions used in the benchmark, but they can be useful for creating small, one-off functions.

**Alternative Approaches**

Other approaches to selecting elements in JavaScript include:

1. **CSS Selectors**: Using CSS selectors to select elements can be faster than using JavaScript's `querySelector` or `querySelectorAll` methods.
2. **Attribute Query Language (AQE)**: AQE is a language that allows for more complex attribute queries, but it can also be slower than other approaches.

In summary, the benchmark measures the performance of four different selector approaches: ID attribute, ID, class, and data attribute. Each approach has its pros and cons, and understanding these differences can help developers optimize their code for better performance.

Latest run results:

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

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 16_3_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.3 Mobile/15E148 Safari/604.1

Browser/OS: Mobile Safari 16 on iOS 16.3.1

View result in a separate tab

Test name	Executions per second
ID attribute	2138779.2 Ops/sec
ID	2575529.8 Ops/sec
Data attr	1952838.5 Ops/sec
Class	3138020.0 Ops/sec

Related benchmarks:

SLEEK - Selector test 2 (version: 0)

Comparing performance of: ID attribute vs ID vs Data attr vs Class

Created: one year ago by: Guest

Jump to the latest result

ID attribute

ID

Data attr

Class

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):