Benchmark: getComputedStyleDx

HTML Preparation code:

<div id="test"></div>

Tests:

vis
var test = document.getElementById("test"); test.innerHtml += '<div style="border: 1px solid green">foo</div>'; var style = window.getComputedStyle(test); var vis = style.visibility;
height
var test = document.getElementById("test"); test.innerHtml += '<div style="border: 1px solid green">foo</div>'; var style = window.getComputedStyle(test); var height = style.height;

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
vis
height

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

This benchmark does not have any results yet. Be the first one to run it!

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

LLMs can make mistakes. Check important info.

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

**Benchmark Definition**

The benchmark is defined as a JavaScript test case that measures the performance of `getComputedStyle()` on an HTML element. The test creates an HTML element, appends a styled div to it, and then uses `getComputedStyle()` to retrieve the visibility property of the innermost div.

**Options Compared**

There are two options being compared:

1. **Visibility (`vis`)**: This option measures the performance of retrieving the visibility property.
2. **Height (`height`)**: This option measures the performance of retrieving the height property.

**Pros and Cons of Each Approach**

Both options involve using `getComputedStyle()` to retrieve a style property from an element. The main difference is that one option is measuring the visibility, which may not be as computationally expensive as measuring other properties like height or width.

Pros and Cons:

* **Visibility (`vis`)**:
	+ Pros: May be faster since it doesn't require retrieving a pixel value (which can be more expensive).
	+ Cons: May still involve some computation to determine the visibility (e.g., if the element has an opaque background).
* **Height (`height`)**:
	+ Pros: Typically involves fewer computations, as it only requires retrieving a single pixel value.
	+ Cons: May be slower due to the need to retrieve multiple pixels.

**Library and Purpose**

The `getComputedStyle()` function is part of the Web APIs (Web Applications Programming Interface) and allows developers to access an element's computed style properties. It returns an object containing the style properties of the element, with each property being a value returned by the corresponding getter function for that property (e.g., `getComputedStyle(element).visibility`).

**Special JS Feature or Syntax**

There is no special JavaScript feature or syntax being used in this benchmark.

**Alternatives**

Other alternatives to measuring performance using benchmarks like MeasureThat.net include:

* Using a testing framework like Jest, Mocha, or Cypress.
* Utilizing a profiling tool like Chrome DevTools, Firefox Developer Edition, or Node.js Inspector.
* Writing custom performance measurement scripts using tools like BenchmarkJS or SimpleBench.

Keep in mind that the choice of alternative often depends on the specific use case and requirements.

Related benchmarks:

getComputedStyleDx (version: 0)

Comparing performance of: vis vs height

Created: 5 years ago by: Guest

Jump to the latest result

vis

height

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):