Benchmark: Get element by ID: jQuery vs getElementById vs querySelector

HTML Preparation code:

<div><p>Test</p><div><p>Test</p></div></div><div><div><div><p>Test</p></div><div><p>Test</p></div><div><p>Test</p></div><div id="content"></div></div></div>

Tests:

jQuery
var el = $('#content');
getElementById
var el = document.getElementById('content');
querySelector
var el = document.querySelector('#content')

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
jQuery
getElementById
querySelector

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated one month ago):

LLMs can make mistakes. Check important info.

**Overview of the Benchmark**

The provided benchmark measures the performance of three different methods for getting an HTML element by its ID: jQuery, `document.getElementById`, and `document.querySelector`. The goal is to determine which method is the fastest.

**Options Compared**

1. **jQuery**: Uses a DOM library to select elements based on their IDs or other properties.
2. **`document.getElementById`**: A native JavaScript method that returns the first element with the specified ID.
3. **`document.querySelector`**: A native JavaScript method that returns the first element matching the specified CSS selector.

**Pros and Cons of Each Approach**

1. **jQuery**:
	* Pros: Easy to use, efficient, and widely supported.
	* Cons: Adds an extra library to the project, which can increase bundle size and dependencies.
2. **`document.getElementById`**:
	* Pros: Fast, lightweight, and doesn't require any additional libraries.
	* Cons: May not be as convenient or flexible as jQuery or `querySelector`.
3. **`document.querySelector`**:
	* Pros: Fast, lightweight, and provides a more flexible way to select elements than `getElementById`.
	* Cons: Can be slower than `getElementById` for simple selectors, and may require additional CSS expertise.

**Library Used**

The benchmark uses jQuery, which is a popular JavaScript library that simplifies DOM manipulation and event handling. It's widely used in web development and provides an easy-to-use API for selecting elements based on their IDs or other properties.

**Special JS Feature/Syntax**

None of the methods mentioned rely on any special JavaScript features or syntax. They are all standard ECMAScript methods or part of a widely supported library (jQuery).

**Other Alternatives**

If you need to get an HTML element by its ID, there are other alternatives:

1. **`document.querySelectorAll`**: Similar to `querySelector`, but returns an array of elements that match the selector.
2. **`Element.prototype.matches`** (or **`Node.prototype.contains`**): Part of the W3C DOM standard, provides a way to test if an element matches a CSS selector.

In summary, the benchmark measures the performance of three common methods for getting an HTML element by its ID: jQuery, `document.getElementById`, and `document.querySelector`. Understanding the pros and cons of each approach can help you choose the best method for your specific use case.

Latest run results:

Run details: (Test run date: 7 years ago)

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3112.113 Safari/537.36

Browser/OS: Chrome 60 on Linux

View result in a separate tab

Test name	Executions per second
jQuery	764683.4 Ops/sec
getElementById	2894521.2 Ops/sec
querySelector	2394152.0 Ops/sec

Related benchmarks:

Get element by ID: jQuery vs getElementById vs querySelector (version: 0)

Comparing performance of: jQuery vs getElementById vs querySelector

Created: 7 years ago by: Guest

Jump to the latest result

jQuery

getElementById

querySelector

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated one month ago):