Benchmark: jQuery.is perf test

HTML Preparation code:

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<img id="el">

Script Preparation code:

var $el = $("#el");
var el = $el.get(0);

Tests:

jQuery
var b = $el.is('img');
native
var a = el.nodeName === 'IMG';

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
jQuery
native

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 3 years ago)

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/93.0.4577.83 Safari/537.36

Browser/OS: Chrome 93 on Linux

View result in a separate tab

Test name	Executions per second
jQuery	981742.8 Ops/sec
native	10806247.0 Ops/sec

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

LLMs can make mistakes. Check important info.

I'll break down the provided benchmark definition, test cases, and latest benchmark results to explain what's being tested.

**Benchmark Definition**

The benchmark is designed to compare the performance of two approaches: using jQuery's `is()` method and native JavaScript's equality check (`nodeName === 'IMG'`).

The script preparation code includes a jQuery reference and an HTML image element with an ID `"el"`. This setup allows the benchmark to test the performance of each approach.

**Options being compared**

Two options are being compared:

1. **jQuery**: The `is()` method is used to check if the element matches a specific node name or selector.
2. **Native JavaScript**: A direct equality check using the `nodeName` property is used to verify if the element's node type is `'IMG'`.

**Pros and Cons of each approach**

* **jQuery's `is()` method**:
	+ Pros: More concise and expressive, allows for flexible matching rules (e.g., attribute checks).
	+ Cons: Potential performance overhead due to jQuery's abstraction and additional functionality.
* **Native JavaScript's equality check (`nodeName === 'IMG'`)**:
	+ Pros: Lightweight, straightforward, and directly accesses the element's node type.
	+ Cons: May require more boilerplate code for complex matching rules.

**Library used**

The benchmark uses jQuery, a popular JavaScript library for DOM manipulation and event handling. The `is()` method is a convenience function that provides a simple way to match elements against various conditions.

**Special JS feature or syntax**

None are mentioned in the provided benchmark definition.

**Other considerations**

When writing performance benchmarks like this one, it's essential to consider factors such as:

* Data size and distribution
* Hardware and software configurations (e.g., device type, operating system, browser version)
* Other competing workloads or library dependencies

**Alternatives**

If you were to rewrite this benchmark or create a new one, some alternatives to consider include:

* Using a modern JavaScript alternative like React or Angular for DOM manipulation
* Implementing custom equality checks using bitwise operations or regular expressions
* Adding additional test cases with varying data sizes or complexities
* Comparing performance under different hardware or software configurations

Keep in mind that benchmarking is an iterative process, and results may vary depending on the specific use case and environment.

Related benchmarks:

jQuery.is perf test (version: 0)

Comparing performance of: jQuery vs native

Created: 3 years ago by: Guest

Jump to the latest result

jQuery

native

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):