Benchmark: classList vs 2 classList

HTML Preparation code:

<div id="foo"></div>

Tests:

2 classList
var element = document.getElementById("foo"); var i = 1000; while (i--) { element.classList.add("bar", "booat_show"); }
classList
var element = document.getElementById("foo"); var i = 1000; while (i--) { element.classList.add("bar"); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
2 classList
classList

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 28 days ago):

LLMs can make mistakes. Check important info.

I'll break down the explanation into smaller parts to make it easier to understand.

**Benchmark Purpose:**
The benchmark on MeasureThat.net is designed to compare the performance of two approaches for adding classes to an HTML element:

1. Using the `classList` property directly (option 1).
2. Using a loop with a class list containing multiple values (option 2).

**Options Compared:**

* Option 1: Directly using the `classList` property.
* Option 2: Using a loop with a class list containing multiple values.

**Pros and Cons of Each Approach:**

* **Option 1: Directly using the `classList` property.**
	+ Pros:
		- More concise and readable code.
		- Likely to be faster, as it's optimized for performance by the browser.
	+ Cons:
		- May not work in older browsers that don't support the `classList` property (though most modern browsers do).
* **Option 2: Using a loop with a class list containing multiple values.**
	+ Pros:
		- Works in all modern browsers, including older ones.
	+ Cons:
		- More verbose and less readable code.
		- Likely to be slower than Option 1 due to the overhead of the loop.

**Library and Purpose:**

None mentioned explicitly in this benchmark definition. However, it's likely that the `classList` property is part of the HTML DOM API, which provides a convenient way to work with classes on web pages.

**Special JavaScript Features or Syntax:**
None mentioned in this benchmark definition.

**Other Considerations:**

* The benchmark uses a simple `while` loop to add classes to an element 1000 times. This may not be representative of real-world usage, which might involve more complex scenarios.
* The test environment is specified as Chrome 69 on a Fedora Linux desktop machine.

**Alternatives:**
Other alternatives for adding classes to an HTML element include:

* Using the `addEventListener` method with the `classList` property's event handler (e.g., `element.addEventListener('classlistchange', function() { ... });`).
* Using a library like jQuery or vanilla JavaScript libraries that provide class manipulation functions (e.g., `$().addClass()`).

Keep in mind that these alternatives might not be as concise or readable as the `classList` property, but they can offer more control and flexibility for certain use cases.

Latest run results:

Run details: (Test run date: 6 years ago)

User agent: Mozilla/5.0 (X11; Fedora; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36

Browser/OS: Chrome 69 on Fedora

View result in a separate tab

Test name	Executions per second
2 classList	1020.5 Ops/sec
classList	1038.4 Ops/sec

Related benchmarks:

classList vs 2 classList (version: 0)

Comparing performance of: 2 classList vs classList

Created: 6 years ago by: Guest

Jump to the latest result

2 classList

classList

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 28 days ago):