Benchmark: getAttribute('data-foo') vs dataset.foo

HTML Preparation code:

<div id="test" data-foo="bar"></div>

Script Preparation code:

var testDiv = document.getElementById('test');

Tests:

getAttribute
var foo = testDiv.getAttribute('data-foo');
dataset
var foo = testDiv.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: 9 months ago)

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/138.0.0.0 Safari/537.36

Browser/OS: Chrome 138 on Linux

View result in a separate tab

Test name	Executions per second
getAttribute	38623884.0 Ops/sec
dataset	20607288.0 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 benchmark and explain what's being tested, the options compared, pros and cons of each approach, and other considerations.

**What's being tested?**

The benchmark measures the performance difference between two ways to access HTML attribute data:

1. `getAttribute('data-foo')`
2. `dataset.foo`

These two approaches are used to retrieve the value of an HTML attribute called "data-foo" from a `<div>` element with the id "test".

**Options compared**

There are two test cases:

1. `getAttribute`
	* This approach uses the built-in JavaScript method `getAttribute()` to dynamically access HTML attributes.
2. `dataset`
	* This approach uses the `dataset` property of an HTML element, which is a standardized feature introduced in HTML5.

**Pros and Cons of each approach**

1. **getAttribute()**
	+ Pros:
		- Widespread support across browsers (even older ones).
		- Simple to use.
	+ Cons:
		- May be slower due to the overhead of parsing the attribute name and value.
2. **dataset**
	* Pros:
		- Faster, as it bypasses the need for attribute parsing.
		- More readable and expressive code.
	+ Cons:
		- Requires HTML5 support (not available in older browsers).
		- Less intuitive for non-HTML5 developers.

**Other considerations**

1. **Browser limitations**: The benchmark is running on Firefox 119, which supports the `dataset` property. However, other browsers may not support this feature.
2. **HTML attribute implementation**: Some browsers may implement attributes in different ways, affecting performance. For example, Internet Explorer uses a proprietary implementation called "data" instead of "dataset".
3. **Optimization and caching**: Browsers can optimize and cache frequently accessed data, including HTML attributes.

**Library and its purpose**

The `dataset` property is not a library; it's a standardized feature introduced in HTML5. It provides an easy way to access attribute data without having to use `getAttribute()` or other workarounds.

**Special JS feature or syntax**

There are no special features or syntax used in this benchmark. However, it's worth noting that the `dataset` property is a shorthand for accessing attribute data, and its usage can be seen as a simplification of more traditional approaches.

In conclusion, the benchmark measures the performance difference between two ways to access HTML attribute data: using `getAttribute()` and accessing attributes through the `dataset` property. While `getAttribute()` has wider browser support, the `dataset` approach is faster and more readable, but requires HTML5 support and may not work in older browsers.

Related benchmarks:

getAttribute('data-foo') vs dataset.foo (version: 0)

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>

Fastest: N/A

Slowest: N/A

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