Benchmark: getElementById() vs jQuery(#id)

HTML Preparation code:

<script src="//ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.slim.min.js"></script>
<div id="foo" class="foo2"></div>

Tests:

getElementById
var el = document.getElementById("foo"); var className = el.className;
jQuery
var el = $("#foo"); var className = el.className;

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
getElementById
jQuery

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

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

LLMs can make mistakes. Check important info.

Let's dive into explaining the benchmark and its various aspects.

**Benchmark Overview**

The provided JSON represents a JavaScript microbenchmark test case created on MeasureThat.net. The test compares the execution performance of `document.getElementById()` versus jQuery (`$`) when retrieving an HTML element with a specific ID, in this case, `foo`.

**Options Compared**

Two options are compared:

1. **`document.getElementById()`**: This is a built-in JavaScript function that retrieves an element by its ID from the DOM (Document Object Model). It's a native JavaScript method.
2. **jQuery (`$`)**: This is a popular JavaScript library for DOM manipulation and event handling. The `#id` syntax is used to select an element with a specific ID.

**Pros and Cons of Each Approach**

1. **`document.getElementById()`**:
	* Pros: Native JavaScript, faster execution (since it doesn't require loading a separate library).
	* Cons: May not be as convenient or feature-rich as jQuery for DOM manipulation tasks.
2. **jQuery (`$`)**:
	* Pros: Feature-rich, convenient, and widely adopted, making it easy to find resources and community support.
	* Cons: Requires loading an additional library (jQuery), which can impact page load times.

**Library Used - jQuery**

The `$.` syntax is used in the benchmark to select the element with ID `foo`. This is because jQuery provides a more convenient way to interact with the DOM, making it easier to write DOM manipulation code. In this case, the `$(\"#foo\")` expression is equivalent to `document.getElementById(\"foo\");`, but it's often faster and more readable.

**Other Considerations**

* **DOM Manipulation**: jQuery provides many features for manipulating the DOM, such as selecting elements, adding/removing classes, event handling, etc. While `document.getElementById()` can be used for basic DOM manipulation, jQuery offers a lot of convenience.
* **Page Load Times**: Loading jQuery as an additional library can impact page load times, especially if it's not already loaded in the HTML file.

**Benchmark Results**

The latest benchmark results show that Chrome Mobile 90 on Android executes `document.getElementById()` slightly faster than jQuery. This result might vary depending on the specific hardware and software configuration of the device being tested.

**Other Alternatives**

If you're interested in exploring alternative libraries or methods for DOM manipulation, here are a few options:

* **Vanilla JavaScript alternatives**: Instead of using `document.getElementById()`, you could use other vanilla JavaScript methods like `getElementsByClassName()` or `querySelector()` to select elements.
* **Other JavaScript libraries**: Libraries like React, Angular, or Vue.js provide their own set of DOM manipulation APIs and might offer better performance or features for specific use cases.
* **Native browser functions**: Some browsers have native functions for DOM manipulation, such as Safari's `document.querySelector()` or Edge's `document.querySelectorAll()`.

Related benchmarks:

getElementById() vs jQuery(#id) (version: 0)

Comparing performance of: getElementById vs jQuery

Created: 7 years ago by: Guest

Jump to the latest result

getElementById

jQuery

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):