Benchmark: jQuery by id vs Document.getElementById vs Document.querySelector

HTML Preparation code:

<script type="text/javascript" src="http://ajax.aspnetcdn.com/ajax/jQuery/jquery-3.1.0.min.js"></script>
<div id="cadre_slider_decoration" class="twentytwenty-container">
								<img src="https://www.w3schools.com/css/trolltunga.jpg" id="image_slider_decoration_before" class="image_slider_decoration twentytwenty-before" style="clip: rect(0px 225.5px 301px 0px);">
								<img src="https://www.w3schools.com/css/trolltunga.jpg" id="image_slider_decoration_after" class="image_slider_decoration twentytwenty-after">
							<div class="twentytwenty-overlay"><div class="twentytwenty-before-label"></div><div class="twentytwenty-after-label"></div></div><div class="twentytwenty-handle" style="left: 225.5px;"><span class="twentytwenty-left-arrow"></span><span class="twentytwenty-right-arrow"></span></div></div>

Tests:

jQuery
var sliderW; for(var i = 0; i < 1000000; i++){ sliderW = $("#image_slider_decoration_after"); }
getElementById
var sliderW; for(var i = 0; i < 1000000; i++){ sliderW = document.getElementById("image_slider_decoration_after") }
querySelector
var sliderW; for(var i = 0; i < 1000000; i++){ sliderW = document.querySelector("#image_slider_decoration_after") }

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

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/80.0.3987.163 Safari/537.36

Browser/OS: Chrome 80 on Windows

View result in a separate tab

Test name	Executions per second
jQuery	1.5 Ops/sec
getElementById	4.1 Ops/sec
querySelector	2.2 Ops/sec

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

LLMs can make mistakes. Check important info.

**Benchmark Overview**

The provided benchmark compares the performance of three different approaches to retrieve an HTML element by its ID: jQuery, `document.getElementById`, and `document.querySelector`. The test case uses JavaScript as the programming language.

**Comparison Options**

1. **jQuery**: jQuery is a popular JavaScript library that provides a simplified way to manipulate the DOM. In this benchmark, jQuery is used to retrieve an element by its ID using the `$()` function.
2. **`document.getElementById`**: This is a vanilla JavaScript method that retrieves an element by its ID using the `getElementById()` function.
3. **`document.querySelector`**: This is another vanilla JavaScript method that retrieves an element by its CSS selector using the `querySelector()` function.

**Pros and Cons of each Approach**

1. **jQuery**:
	* Pros: Simplified syntax, faster execution (due to caching and optimized DOM manipulation).
	* Cons: Adds extra library dependency, may have performance overhead due to DOM manipulation.
2. **`document.getElementById`**:
	* Pros: Lightweight, no additional library dependencies.
	* Cons: More verbose syntax, slower execution (especially for complex selectors).
3. **`document.querySelector`**:
	* Pros: Flexible CSS selector syntax, efficient execution.
	* Cons: May have performance overhead due to the complexity of CSS selectors.

**Library and Syntax Considerations**

The benchmark uses jQuery version 3.1.0, which is an older version that may not be as efficient as newer versions. The `document.querySelector` method uses a simple selector syntax, whereas more complex queries might require additional parsing and evaluation.

**Special JS Feature or Syntax**

None of the benchmarked methods use any special JavaScript features or syntax beyond standard DOM manipulation.

**Other Alternatives**

For this specific benchmark, other alternatives could include:

* Using a library like React or Angular for client-side rendering and DOM manipulation.
* Implementing custom rendering mechanisms using WebAssembly or other low-level languages.
* Utilizing server-side rendering techniques to generate HTML and reduce client-side processing.

However, for simple cases like this one, the vanilla JavaScript approaches (`document.getElementById` and `document.querySelector`) are likely sufficient.

Related benchmarks:

jQuery by id vs Document.getElementById vs Document.querySelector (version: 0)

Comparing speed of getting element by id with jQuery vs Vanilla JS

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 2 months ago):