Benchmark: getAttribute vs dataset

HTML Preparation code:

<div id="foo" data-foo="foo_id"></div>

Tests:

getAttribute
var element = document.getElementById("foo"); var i = 10000; while (i--) { var foo = element.getAttribute("data-foo"); }
dataset
var element = document.getElementById("foo"); var i = 10000; while (i--) { var foo = element.dataset.foo; }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
getAttribute
dataset

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 4 days ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:138.0) Gecko/20100101 Firefox/138.0

Browser/OS: Firefox 138 on Mac OS X 10.15

View result in a separate tab

Test name	Executions per second
getAttribute	187552.2 Ops/sec
dataset	2699.9 Ops/sec

Autogenerated LLM Summary (model llama3.2:3b, generated 6 months ago):

LLMs can make mistakes. Check important info.

Let's break down the benchmark and its options.

**Benchmark Overview**

The benchmark compares two ways to access data attributes in HTML elements: `getAttribute` and `dataset`. The goal is to determine which method is faster.

**Script Preparation Code**

There is no script preparation code provided for this benchmark. This means that the test starts with a clean slate, without any additional JavaScript code that might affect the results.

**HTML Preparation Code**

The HTML preparation code creates a simple element with a `data-foo` attribute:
```
<div id="foo" data-foo="foo_id"></div>
```
This element will be used to test both `getAttribute` and `dataset`.

**Individual Test Cases**

There are two test cases:

1. **`getAttribute`**: This test case uses the `getAttribute` method to access the `data-foo` attribute. The benchmark defines a while loop that iterates 10,000 times, accessing the attribute on each iteration.
2. **`dataset`**: This test case uses the `dataset` property to access the same `data-foo` attribute. Again, the benchmark defines a while loop that iterates 10,000 times, accessing the attribute on each iteration.

**Pros and Cons of Each Approach**

* **`getAttribute`**:
	+ Pros: widely supported, simple syntax.
	+ Cons: can be slower than `dataset` for large datasets, as it involves parsing the attribute string.
* **`dataset`**:
	+ Pros: faster for large datasets, more efficient parsing.
	+ Cons: requires browser support (introduced in HTML5), slightly less widely supported.

**Library/Technique Used**

In this benchmark, no libraries or techniques beyond standard JavaScript are used. The `dataset` property is a built-in feature of the DOM API.

**Special JS Features/Syntax**

None mentioned explicitly. However, it's worth noting that some older browsers may not support the `dataset` property or have slightly different behavior when using `getAttribute`.

**Other Alternatives**

If you want to compare other methods for accessing data attributes in HTML elements, you could consider:

* Using a library like jQuery, which provides a more convenient API for accessing attributes (e.g., `.attr()`).
* Using a custom implementation, such as parsing the attribute string or using regular expressions.
* Comparing other approaches, such as using CSS to define the attribute values and then querying them in JavaScript.

Related benchmarks:

getAttribute vs dataset (version: 0)

Compare setAttribute to dataset

Comparing performance of: getAttribute vs dataset

Created: 3 years ago by: Guest

Jump to the latest result

getAttribute

dataset

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 6 months ago):