Benchmark: cssRule - MeasureThat.net

HTML Preparation code:

<html>
<style>
    html {
    color: red;
      }
</style>

</html>

Script Preparation code:

window.myRules = document.styleSheets[0].cssRules;

Tests:

type
myRules[0].type === 1
inf
myRules[0] instanceof CSSStyleRule

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
type
inf

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

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

LLMs can make mistakes. Check important info.

I'll break down the benchmark definition and test cases to explain what's being tested.

**Benchmark Definition**

The provided JSON represents a JavaScript microbenchmark that tests two different aspects of CSS rules.

1. **Script Preparation Code**: The script preparation code sets up a variable `window.myRules` by getting the first CSS rule from the `document.styleSheets[0]`. This is likely done to isolate the test and ensure consistency.
2. **Html Preparation Code**: The HTML preparation code includes a simple stylesheet with an inline style that changes the text color of the `<html>` element to red.

**Individual Test Cases**

The benchmark defines two individual test cases:

1. **Test Name: "type"**
	* **Benchmark Definition**: `myRules[0].type === 1`
	* This test case checks if the type of the first CSS rule in the `myRules` array is 1, which typically represents a CSSRule.
	* Pros:
		+ Simple and straightforward test
	* Cons:
		+ May not accurately represent real-world scenarios where CSS rules can have different types (e.g., media queries)
2. **Test Name: "inf"**
	* **Benchmark Definition**: `myRules[0] instanceof CSSStyleRule`
	* This test case checks if the first element in the `myRules` array is an instance of `CSSStyleRule`, which is a class that represents a CSS rule with style properties.
	* Pros:
		+ More accurate representation of real-world scenarios where CSS rules are often instances of `CSSStyleRule`
	* Cons:
		+ May be slower than the "type" test case due to the additional type check

**Library Used**

The benchmark uses the `CSSStyleRule` class, which is a part of the W3C's Web APIs (Web Components, CSSOM, and DOM). The purpose of this library is to provide a way for developers to work with CSS rules in JavaScript, allowing them to manipulate styles and create complex layouts.

**Special JS Feature/Syntax**

There are no special JS features or syntax used in this benchmark. It only uses standard JavaScript and the `CSSStyleRule` class from the W3C's Web APIs.

**Alternatives**

Other alternatives for benchmarking CSS rules might include:

1. Using a library like `cssom-viewer` to manipulate CSS rules and styles.
2. Creating a custom test harness that simulates CSS rule creation and manipulation.
3. Using a real-world testing framework like Jest or Mocha, which can provide more advanced features for writing and running tests.

Keep in mind that the specific benchmarking approach will depend on the goals of the project and the requirements of the developers.

Related benchmarks:

cssRule (version: 0)

Comparing performance of: type vs inf

Created: 4 years ago by: Guest

Jump to the latest result

type

inf

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):