Benchmark: test id vs class

HTML Preparation code:

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

Tests:

by id
$("#elem").hide()
by class
$(".leem").hide()
by id js
document.querySelector("#elem").style.display = 'none'

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
by id
by class
by id js

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.

**What is tested:**

MeasureThat.net is a website that allows users to create and run JavaScript microbenchmarks. The provided benchmark definition and individual test cases measure the performance of different methods for hiding HTML elements.

**Options compared:**

There are three options compared:

1. **`$(" #elem ").hide()`**: This method uses jQuery's `hide()` function to set the display property of the element with the id "elem" to none.
2. **`$(".leem").hide()`**: This method uses jQuery's `hide()` function to set the display property of all elements with the class "leem".
3. **`document.querySelector("#elem").style.display = 'none'`**: This method uses the `querySelector()` function to select the element with the id "elem" and then sets its display style to none using the `style` property.

**Pros and cons of each approach:**

1. **`$(" #elem ").hide()`**:
	* Pros:
		+ Faster, since it doesn't require parsing the HTML element.
		+ More concise.
	* Cons:
		+ May not be as readable for developers who are not familiar with jQuery.
2. **`$(".leem").hide()`**:
	* Pros:
		+ More general, can hide multiple elements with the same class.
		+ Can be more efficient if there are many elements to hide.
	* Cons:
		+ May require more computation time to select all matching elements.
3. **`document.querySelector("#elem").style.display = 'none'`**:
	* Pros:
		+ More explicit, clearly shows what's happening in the code.
		+ Does not rely on jQuery or any other library.
	* Cons:
		+ Less concise than the first two options.

**Libraries and their purpose:**

In this benchmark, `jQuery` is a JavaScript library that simplifies DOM manipulation. It provides a way to select elements from the document and perform operations on them in a more convenient and efficient manner.

**Special JS feature or syntax:**

There are no special JavaScript features or syntax mentioned in the provided code snippets. The syntax used is standard JavaScript, with the exception of the `jQuery` library mentioned earlier.

**Alternative approaches:**

Other alternatives for hiding HTML elements could include:

1. Using CSS to hide the element (e.g., `elem { display: none; }`).
2. Using a CSS framework like Bootstrap or Materialize, which provide built-in support for hiding elements.
3. Writing custom JavaScript code using the `getElementsByClassName()` method or a library like React or Angular.

It's worth noting that the best approach will depend on the specific use case and requirements of the project. The MeasureThat.net benchmark can help identify which approach is fastest, but it may not always determine the most readable or maintainable solution.

Related benchmarks:

test id vs class (version: 1)

Comparing performance of: by id vs by class vs by id js

Created: 6 years ago by: Registered User

Jump to the latest result

by id

by class

by id js

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):