Benchmark: Contains vs All remove class

HTML Preparation code:

<div class="huts"></div> 
<div class="huts"></div> 
<div class="huts"></div> 
<div class="huts"></div> 
<div class="huts"></div> 
<div class="huts"></div> 
<div class="huts"></div> 
<div class="huts is-active"></div> 
<div class="huts"></div> 
<div class="huts"></div>

Tests:

contains
const innerDivs = document.querySelectorAll('.huts'); innerDivs.forEach((item, index) => { if (item.classList.contains('is-active')) { item.classList.remove('is-active'); } if (index === 4) { item.classList.add('is-active'); } })
alles
const innerDivs = document.querySelectorAll('.huts'); innerDivs.forEach((item, index) => { item.classList.remove('is-active'); if (index === 4) { item.classList.add('is-active'); } })

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
contains
alles

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 explain what's being tested.

**Benchmark Overview**

The benchmark measures the performance of two approaches for removing a CSS class from HTML elements. The test case uses JavaScript, specifically `document.querySelectorAll` and `forEach` methods, to target elements with the `.huts` class.

**Options Compared**

Two approaches are compared:

1. **Contains vs All Remove Class**: This is the main comparison between the two test cases.
	* In the "contains" test case, only elements that contain the `is-active` class will have it removed.
	* In the "alles" (German for "all") test case, all elements with the `.huts` class will have the `is-active` class removed.
2. **Library Usage**: Both test cases use the `document.querySelectorAll` method to select elements, but they differ in their implementation details.

**Pros and Cons of Each Approach**

1. **Contains vs All Remove Class**
	* **Contains**:
		+ Pros: More efficient, as only necessary elements are removed.
		+ Cons: May be slower due to the filtering process.
	* **Alls** (alles):
		+ Pros: Faster, as all matching elements are removed at once.
		+ Cons: Less efficient, as unnecessary elements are removed.

**Library and Its Purpose**

The `document.querySelectorAll` method is a part of the DOM (Document Object Model) API, which allows you to select and manipulate HTML elements programmatically. In this benchmark, it's used to target elements with the `.huts` class.

**Special JS Feature or Syntax**

None mentioned in the provided code snippets.

**Other Alternatives**

If you want to optimize your JavaScript code for removing CSS classes from HTML elements, consider the following alternatives:

1. **Using `forEach` with a callback function**: Similar to the "contains" test case.
2. **Using `Array.prototype.filter()`**: Instead of using `forEach`, you can use the `filter()` method to create an array of elements that don't contain the `is-active` class, and then remove the class from each of those elements.
3. **Using a library like jQuery**: If you're working with complex DOM manipulation, consider using a JavaScript library like jQuery, which provides methods for selecting and manipulating elements.

In conclusion, the benchmark measures the performance difference between two approaches to removing CSS classes from HTML elements: containing vs all removal class. The "contains" test case is more efficient but may be slower due to filtering, while the "alles" (alles) test case is faster but less efficient.

Related benchmarks:

Contains vs All remove class (version: 0)

Comparing performance of: contains vs alles

Created: 2 years ago by: Guest

Jump to the latest result

contains

alles

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):