Benchmark: id vs getAttribute

HTML Preparation code:

<div id="d0" class="data" data-test="lorem">test dataset</h3>

Tests:

id
document.querySelector('.data').d0;
getAttribute
document.querySelector('.data').getAttribute('test');

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
id
getAttribute

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/117.0.0.0 Mobile Safari/537.36

Browser/OS: Chrome Mobile 117 on Android

View result in a separate tab

Test name	Executions per second
id	560350.5 Ops/sec
getAttribute	293806.0 Ops/sec

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

LLMs can make mistakes. Check important info.

I'll break down the provided benchmarking scenario for you.

**What is being tested?**

The benchmark measures the performance difference between using an `id` and using the `getAttribute()` method to retrieve an element's attribute value in JavaScript.

**Options compared:**

There are two options being compared:

1. **Using an `id`**: This involves directly referencing an element by its `id` attribute.
2. **Using `getAttribute()`**: This involves retrieving an element's attribute value using the `getAttribute()` method.

**Pros and cons of each approach:**

1. **Using an `id`**:
	* Pros:
		+ Fast, as it directly references the element without any additional lookups.
		+ Can be more efficient in terms of DOM queries.
	* Cons:
		+ May not work if the element is dynamically generated or has a different class name.
2. **Using `getAttribute()`**:
	* Pros:
		+ More flexible, as it can handle elements with dynamic class names or attributes that change over time.
	* Cons:
		+ May be slower due to the additional lookups and parsing required by the `getAttribute()` method.

**Library usage:**

In this benchmark, no libraries are explicitly mentioned. However, the use of `document.querySelector()` implies that the browser's native DOM API is being used.

**Special JS feature or syntax:**

There are no special JavaScript features or syntaxes mentioned in this benchmark. The code uses standard JavaScript syntax and DOM APIs.

**Alternative approaches:**

Other alternatives to using `id` and `getAttribute()` could include:

1. **Using `className`**: Some browsers support retrieving an element's class name using the `className` property.
2. **Using a CSS selector library**: Libraries like jQuery or Sizzle provide more flexible and efficient ways to select elements based on their class names, IDs, or other attributes.

Keep in mind that these alternatives might not be supported by all browsers or versions, so it's essential to consider the target audience and browser requirements when choosing an approach.

Related benchmarks:

id vs getAttribute (version: 0)

Comparing performance of: id vs getAttribute

Created: one year ago by: Guest

Jump to the latest result

id

getAttribute

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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