Benchmark: getAttribute vs dataset (without explicit loop)

HTML Preparation code:

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

Tests:

getAttribute
var element = document.getElementById("foo"); var foo = element.getAttribute("data-foo");
dataset
var element = document.getElementById("foo"); 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: 2 months ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/145.0.0.0 Safari/537.36

Browser/OS: Chrome 145 on Windows

View result in a separate tab

Test name	Executions per second
getAttribute	26810748.0 Ops/sec
dataset	16590174.0 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the provided JSON and explain what's being tested.

**Benchmark Definition**

The benchmark is designed to compare two approaches for accessing data in HTML elements: `getAttribute` and `dataset`. The script preparation code is empty, which means that the JavaScript code will be run on a clean slate. The HTML preparation code creates a simple `<div>` element with an ID "foo" and a `data-foo` attribute set to "foo_id".

**Individual Test Cases**

There are two test cases:

1. **Test Case 1: `getAttribute`**
The benchmark definition is:
```javascript
var element = document.getElementById("foo");
var foo = element.getAttribute("data-foo");
```
This test case uses the `getAttribute` method to access the value of the `data-foo` attribute on the `foo` element.

2. **Test Case 2: `dataset`**
The benchmark definition is:
```javascript
var element = document.getElementById("foo");
var foo = element.dataset.foo;
```
This test case uses the `dataset` property to access the value of the `foo` attribute on the `foo` element.

**Options Compared**

The two approaches are compared in terms of performance and speed. The benchmark measures how many executions per second (ExecutionsPerSecond) each approach can handle.

**Pros and Cons**

* **getAttribute**: This method has the advantage of being a standard DOM method that's widely supported across browsers. However, it requires an explicit lookup of the attribute name, which can lead to slower performance compared to other approaches.
* **dataset**: This method is a newer feature introduced in HTML5 that provides a more concise way to access attributes as properties on the element object. It's also faster than `getAttribute` because it doesn't require an extra lookups.

**Library and Purpose**

Neither of these methods rely on any external libraries, but they do utilize the DOM (Document Object Model) API, which is a fundamental part of JavaScript programming.

**Special JS Feature or Syntax**

This benchmark uses a feature that's specific to modern browsers: `dataset`. The `dataset` property is not supported in older browsers like Internet Explorer. This means that if you're targeting older browsers, you may need to use the `getAttribute` method instead.

**Other Alternatives**

If you needed to access attributes on an element without using `getAttribute` or `dataset`, you might consider other approaches:

* Using a library like jQuery, which provides its own way of accessing attributes through the `data()` method.
* Writing custom JavaScript code that uses the DOM API to access attributes.

However, these alternatives are less common and may not be as performant as using the built-in `getAttribute` or `dataset` methods.

Related benchmarks:

getAttribute vs dataset (without explicit loop) (version: 0)

Compare setAttribute to dataset

Comparing performance of: getAttribute vs dataset

Created: one year ago by: Guest

Jump to the latest result

getAttribute

dataset

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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