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jQuery by id vs Document.getElementById
(version: 0)
Comparing speed of getting element by id with jQuery vs Vanilla JS
Comparing performance of:
jQuery vs Vanilla JS
Created:
9 years ago
by:
Registered User
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HTML Preparation code:
<script type="text/javascript" src="http://ajax.aspnetcdn.com/ajax/jQuery/jquery-3.1.0.min.js"></script> <div id="testElement"></div>
Tests:
jQuery
var el = $("#testElement")[0]; var className = el.className;
Vanilla JS
var el = document.getElementById('testElement'); var className = el.className;
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
jQuery
Vanilla JS
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
one month ago
)
User agent:
Mozilla/5.0 (iPhone; CPU iPhone OS 18_7 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.3 Mobile/15E148 Safari/604.1
Browser/OS:
Mobile Safari 26 on iOS 18.7
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Embed Benchmark Result
Test name
Executions per second
jQuery
7817656.0 Ops/sec
Vanilla JS
42124628.0 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided JSON and explain what's being tested. **Benchmark Overview** The benchmark compares the speed of getting an element by its ID using two approaches: jQuery (a JavaScript library) and Vanilla JS (plain JavaScript without any libraries). **Options Compared** Two options are compared: 1. **jQuery**: Uses the `$` function from the jQuery library to select elements. 2. **Vanilla JS**: Uses the `document.getElementById()` method to retrieve an element. **Pros and Cons of Each Approach** * **jQuery:** + Pros: - Easier to read and write, thanks to its intuitive syntax. - Can perform additional tasks on the retrieved element, like finding siblings or traversing the DOM. + Cons: - Adds extra overhead due to the library's execution time and memory usage. - May not be suitable for all situations, especially when working with older browsers that don't support jQuery. * **Vanilla JS:** + Pros: - Lightweight and fast, since it relies on native DOM methods. - Works across most modern browsers without any additional libraries or dependencies. + Cons: - Can be more verbose and harder to read for some developers, especially those unfamiliar with the `document.getElementById()` method. **Library: jQuery** jQuery is a popular JavaScript library that simplifies DOM interactions by providing a concise syntax. It's particularly useful when working with complex HTML documents or older browsers that don't support modern JavaScript features. The `$` function used in this benchmark is equivalent to `document.querySelector("#testElement")`, but the latter requires more manual effort. **JavaScript Feature/Syntax: Vanilla JS** This test doesn't use any special JavaScript features or syntax, so we can focus on the comparison between jQuery and plain Vanilla JS. **Other Alternatives** If you want to explore other approaches, consider these options: * **DOM Traversals**: Instead of using `document.getElementById()`, you could use `document.querySelector()` or `document.querySelectorAll()` for more complex selectors. * **Querying Libraries**: Other libraries like Sizzle (the engine behind jQuery) or a homegrown implementation can be used as alternatives to jQuery. Keep in mind that these alternative approaches might have different performance characteristics and requirements, depending on your specific use case.
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