Benchmark: window.getComputedStyle WebKitCSSMatrix vs getAttribute

HTML Preparation code:

<div id="foo" data-attr="foo" style="transform: translate3d(0, -350px, 0)"></div>

Tests:

getComputedStyle
var i = 3000; while (i--) { chekele('foo'); } function chekele(element) { var tr = window.getComputedStyle(document.getElementById(element), null).getPropertyValue("transform"); return matrix = new WebKitCSSMatrix(tr); }
getAttribute
var i = 3000; while (i--) { chekele('foo'); } function chekele(element) { return document.getElementById(element).getAttribute('data-attr'); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
getComputedStyle
getAttribute

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.36

Browser/OS: Chrome 122 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
getComputedStyle	151.6 Ops/sec
getAttribute	3105.1 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.

**Benchmark Overview**

The benchmark compares two approaches to retrieving a CSS transformation value from an HTML element:

1. `window.getComputedStyle` (using WebKitCSSMatrix)
2. `getAttribute`

**Options Compared**

The options being compared are:

* Using `window.getComputedStyle` with `WebKitCSSMatrix` to retrieve the CSS transformation value, and then extracting the matrix data.
* Using the `getAttribute` method of the `element` DOM object to directly retrieve the `data-attr` attribute.

**Pros and Cons of Each Approach**

1. **Using `window.getComputedStyle` with `WebKitCSSMatrix`:**
	* Pros:
		+ Provides access to CSS properties beyond simple attributes.
		+ Can be more convenient for complex styles or transformations.
	* Cons:
		+ May have performance overhead due to the need to create a separate WebKitCSSMatrix object.
		+ Requires additional parsing and processing steps.
2. **Using `getAttribute`:**
	* Pros:
		+ Lightweight and efficient, with minimal overhead.
		+ Directly retrieves the desired attribute value.
	* Cons:
		+ Limited to retrieving simple attributes; more complex styles or transformations may not be accessible.
		+ May require additional processing steps if the attribute is not immediately available.

**Library Usage**

In the benchmark code, `WebKitCSSMatrix` is a library used for parsing and manipulating CSS matrices. It's part of the WebKit rendering engine and provides an efficient way to work with CSS transformations.

**Special JavaScript Features/Syntax**

The benchmark does not appear to use any special JavaScript features or syntax beyond standard ECMAScript 2015 (ES6) syntax.

**Other Alternatives**

If `window.getComputedStyle` is not available or preferred, other alternatives for retrieving CSS transformation values might include:

* Using the `getComputedStyle` method of the `element.ownerDocument` object (if available).
* Utilizing CSS-in-JS solutions like styled-components or emotion.
* Employing custom parsing and processing functions to extract transformation data.

In general, when working with CSS transformations in JavaScript, developers often need to balance performance, convenience, and accuracy. The choice of approach depends on the specific requirements of the project and the trade-offs between these factors.

Related benchmarks:

window.getComputedStyle WebKitCSSMatrix vs getAttribute (version: 0)

Comparing performance of: getComputedStyle vs getAttribute

Created: 6 years ago by: Guest

Jump to the latest result

getComputedStyle

getAttribute

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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