Benchmark: test1113 - MeasureThat.net

HTML Preparation code:

<script type="text/javascript" src="https://code.jquery.com/jquery-3.4.1.min.js"></script>
<div id="testThisId"></div>

Tests:

jQuery
var el = $("#testElement")[0];
Vanilla JS querySelector
var el = document.querySelector('#testElement');
Vanilla JS (get by id)
var el = document.getElementById('testThisId');

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
jQuery
Vanilla JS querySelector
Vanilla JS (get by id)

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 26 days ago):

LLMs can make mistakes. Check important info.

Let's dive into the world of JavaScript microbenchmarks on MeasureThat.net.

**Benchmark Definition JSON**

The provided Benchmark Definition JSON defines two types of benchmarks:

1. **Script Preparation Code**: This is an optional section where users can provide custom code to be executed before running the benchmark. In this case, it's set to `null`, which means no preparation code is required.
2. **Html Preparation Code**: This section contains HTML code that will be rendered in a web page. The provided code includes a script tag referencing jQuery and an empty `<div>` element with an ID of "testThisId".

**Individual Test Cases**

The benchmark consists of three test cases, each representing a different way to retrieve an element from the DOM:

1. **"jQuery"`**: This test case uses jQuery's `$(selector)` method to select an element by its CSS selector. In this case, the selector is "#testElement".
2. **"Vanilla JS querySelector"`**: This test case uses vanilla JavaScript's `querySelector` function to select an element by its CSS selector. The same selector is used as in the jQuery example.
3. **"Vanilla JS (get by id)"`**: This test case uses vanilla JavaScript's `getElementById` method to retrieve an element with a specific ID, which is "testThisId".

**Library: jQuery**

In the HTML Preparation Code, we see that jQuery is loaded via a script tag. jQuery is a popular JavaScript library used for DOM manipulation, event handling, and Ajax requests.

**Pros and Cons of Using jQuery vs. Vanilla JavaScript**

Using jQuery has several advantages:

* **Convenience**: jQuery provides a simple and consistent way to manipulate the DOM and perform DOM-based tasks.
* **Ease of use**: jQuery's API is often more intuitive than vanilla JavaScript for common DOM-related tasks.
* **Browser compatibility**: jQuery supports older browsers by providing polyfills or using the `noConflict` method.

However, there are also some drawbacks:

* **Performance overhead**: jQuery adds a layer of abstraction between your code and the browser's DOM, which can result in slower performance compared to vanilla JavaScript.
* **Dependency on library**: Your application becomes dependent on jQuery being available for all users, which can lead to issues if not properly loaded or updated.

In contrast, using vanilla JavaScript provides more direct control over the DOM and performance. However, it requires a better understanding of browser quirks and compatibility across different browsers.

**Special JS Feature: `querySelector`**

The `querySelector` method is a modern JavaScript feature introduced in ECMAScript 2015 (ES6). It allows you to select an element by its CSS selector, similar to jQuery's `$()` method.

The syntax for `querySelector` is as follows:
```javascript
document.querySelector(selector);
```
Where `selector` is a string containing the CSS selector.

In this benchmark, both jQuery and vanilla JavaScript are using `querySelector` to achieve the same result.

**Other Alternatives**

If you're looking for alternative methods to select elements in your DOM, here are a few options:

* **`getElementsByClassName()`**: Retrieves an array of elements with a specific class name.
* **`getElementById()`**: Retrieves an element by its ID attribute.
* **`getElementsByTagName()`**: Retrieves an array of elements within an ancestor element with the specified tag name.

In summary, MeasureThat.net provides a convenient platform for comparing the performance of different JavaScript approaches to select elements in the DOM. By understanding the pros and cons of using jQuery versus vanilla JavaScript, developers can make informed decisions about their coding choices based on performance requirements and compatibility considerations.

Latest run results:

Run details: (Test run date: 4 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.116 Safari/537.36

Browser/OS: Chrome 80 on Windows

View result in a separate tab

Test name	Executions per second
jQuery	1573128.8 Ops/sec
Vanilla JS querySelector	1398680.9 Ops/sec
Vanilla JS (get by id)	3011877.0 Ops/sec

Related benchmarks:

test1113 (version: 0)

nothing

Comparing performance of: jQuery vs Vanilla JS querySelector vs Vanilla JS (get by id)

Created: 4 years ago by: Guest

Jump to the latest result

jQuery

Vanilla JS querySelector

Vanilla JS (get by id)

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 26 days ago):