Benchmark: jquerySelector vs getElementByClassName

HTML Preparation code:

<div class="testElement"></div>
<script src='https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js'></script>

Tests:

jquerySelector
var el = $('.testElement'); var className = el.className;
getElementByClassName
var el = document.getElementsByClassName('testElement'); var className = el.className;

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
jquerySelector
getElementByClassName

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 24 days ago):

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and explain what is being tested, compared, and their pros and cons.

**What is being tested?**

The test case compares the performance of two ways to get an element by its class name: jQuery's `$()` selector (`jquerySelector`) versus `document.getElementsByClassName()`, known as `getElementByClassName`.

**Options compared:**

1. **jQuery's `$()` selector**: This is a powerful query language for selecting elements on the page. It allows you to target elements based on their tag name, class names, IDs, attributes, and more.
2. **`document.getElementsByClassName()`**: This method returns an array-like object containing all DOM elements with the specified class name. It's a more traditional way of getting elements by class.

**Pros and Cons:**

* jQuery's `$()` selector:
	+ Pros:
		- More flexible and powerful than `document.getElementsByClassName()`
		- Can be used to target multiple classes at once
		- Can be chained with other methods for more complex selections
	+ Cons:
		- Requires including a library (jQuery) which may add extra overhead
		- Can be slower than native DOM methods due to the added complexity
* `document.getElementsByClassName()`:
	+ Pros:
		- Native to JavaScript and doesn't require any libraries
		- Generally faster than jQuery's `$()` selector
	+ Cons:
		- Less flexible and powerful than jQuery's selector
		- Requires calling multiple methods (`getElementsByClassName()`, `length`, etc.)

**Library:**

In the provided benchmark, jQuery is used as a library. The purpose of jQuery is to simplify DOM manipulation and provide a more convenient way to select elements on the page.

**Special JS feature or syntax:**

There are no special JavaScript features or syntaxes being tested in this benchmark. It's purely a performance comparison between two existing methods.

**Other alternatives:**

If you're looking for alternative ways to get elements by class, you could consider using other libraries like:

* `CSS Selectors` (native to modern browsers): You can use the CSS selector API to select elements based on their class names.
* `DOM queries`: Some frameworks and libraries provide DOM query APIs that allow you to select elements in a similar way to jQuery's `$()` selector.

However, it's worth noting that these alternatives may not provide the same level of flexibility or power as jQuery's selector.

Latest run results:

Run details: (Test run date: 5 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/12.1.2 Safari/605.1.15

Browser/OS: Safari 12 on Mac OS X 10.14.6

View result in a separate tab

Test name	Executions per second
jquerySelector	1745488.4 Ops/sec
getElementByClassName	4508210.0 Ops/sec

Related benchmarks:

jquerySelector vs getElementByClassName (version: 0)

Comparing performance of jQuery Selector vs getElementByClassName

Comparing performance of: jquerySelector vs getElementByClassName

Created: 5 years ago by: Guest

Jump to the latest result

jquerySelector

getElementByClassName

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 24 days ago):