Benchmark: 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"); var matrix = new WebKitCSSMatrix(tr); return matrix; }
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:

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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 its results.

**What is being tested?**

The benchmark tests two approaches to retrieve the value of an attribute from an HTML element:

1. **getComputedStyle WebKitCSSMatrix**: This approach uses the `window.getComputedStyle` method to get the computed style of the element, extracts the CSS matrix transform property, converts it to a `WebKitCSSMatrix` object, and returns it.
2. **getAttribute**: This approach simply uses the `document.getElementById` method to retrieve the element and then calls the `getAttribute` method on it to get the value of the specified attribute.

**Options compared**

The two approaches are being compared in terms of their performance, as measured by the number of executions per second.

**Pros and Cons of each approach:**

1. **getComputedStyle WebKitCSSMatrix**
	* Pros:
		+ It provides a way to get the computed style of an element, which might be useful for more complex layout or positioning calculations.
	* Cons:
		+ It involves extra steps (converting the transform property to a `WebKitCSSMatrix` object) that may introduce overhead and slow down the benchmark.
2. **getAttribute**
	* Pros:
		+ It is a simple and straightforward approach that directly retrieves the attribute value from the element's DOM representation.
	* Cons:
		+ It might not be as efficient as other methods, especially if the element has many attributes or if the attribute values are large strings.

**Library used**

In this benchmark, the `WebKitCSSMatrix` object is used to parse and manipulate CSS matrices. This is a proprietary API developed by Apple for its WebKit rendering engine.

**Special JS feature/syntax**

There doesn't appear to be any special JavaScript features or syntax being used in these benchmarks beyond the standard DOM manipulation APIs provided by modern browsers.

**Other alternatives**

If you're looking for alternative approaches to retrieving attribute values, some options might include:

1. **DOM manipulation**: You could use a library like jQuery or another DOM manipulation framework to retrieve attributes from elements.
2. **CSS property access**: Some modern browsers provide ways to access CSS properties directly on the element's style object (e.g., `element.style.transform`). This approach might be more efficient than using `getComputedStyle` and parsing the transform value manually.
3. **Native JavaScript methods**: Depending on the browser, you might find native JavaScript methods for accessing attribute values, such as `element.getAttributeNamedValue()` or `element.getNamedItem()`. However, these APIs are not yet widely supported.

Keep in mind that benchmarking is all about exploring different approaches and identifying performance bottlenecks. If you're interested in optimizing your code, I recommend analyzing the results of this benchmark and considering alternative methods for retrieving attribute values in your specific use case.

Related benchmarks:

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

No previous run results

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