Benchmark: jQuery data VS jQuery attr data

HTML Preparation code:

<script src="//code.jquery.com/jquery-3.4.0.slim.min.js"></script>
<div class="flag"></div>

Tests:

jQuery + data
var flag = $('.flag'); flag.data('flag','iran'); console.log( flag.data('flag') );
jQuery + attr data
var flag = $('.flag'); flag.attr('data-flag','iran'); console.log( flag.attr('data-flag') );

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
jQuery + data
jQuery + attr data

Fastest: N/A

Slowest: N/A

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

LLMs can make mistakes. Check important info.

Let's dive into the world of JavaScript microbenchmarks on MeasureThat.net.

**Overview**

The provided benchmark is designed to compare two approaches for setting and retrieving data with jQuery: using `data()` method versus using `attr()` method. The goal is to determine which approach is faster.

**Script Preparation Code**

The script preparation code includes a single line of JavaScript that loads the jQuery library from a CDN:
```javascript
<script src="//code.jquery.com/jquery-3.4.0.slim.min.js"></script>
```
This sets up the necessary environment for running jQuery-based tests.

**Html Preparation Code**

The HTML preparation code includes a simple `<div>` element with a class of "flag", which will be used as the target element for testing:
```html
<div class="flag"></div>
```
**Benchmark Definition**

The benchmark definition is a JSON object that contains two test cases:

1. **"jQuery + data"**
This test case uses the `data()` method to set and retrieve data on the `.flag` element:
```javascript
var flag = $('.flag');
flag.data('flag', 'iran');
console.log(flag.data('flag'));
```
2. **"jQuery + attr data"**
This test case uses the `attr()` method to set and retrieve data on the `.flag` element:
```javascript
var flag = $('.flag');
flag.attr('data-flag', 'iran');
console.log(flag.attr('data-flag'));
```
**Options Compared**

The two options being compared are:

1. **Using `data()` method**: This approach sets and retrieves data using the `data()` method, which is a built-in jQuery feature for setting and retrieving custom data attributes on elements.
2. **Using `attr()` method with prefix**: This approach uses the `attr()` method to set and retrieve data by prefixing the attribute name with a string (`'data-flag'` in this case).

**Pros and Cons**

**Using `data()` method:**

Pros:

* More efficient and concise way to set and retrieve data
* Built-in jQuery feature, so it's well-integrated with the library

Cons:

* May not work as expected if multiple elements have the same attribute name (although jQuery can handle this by using a more complex syntax)
* Not widely supported in older browsers or non-JQuery libraries

**Using `attr()` method with prefix:**

Pros:

* Widely supported across most browsers and non-JQuery libraries
* Allows for more flexibility when setting and retrieving attributes

Cons:

* Less efficient than using `data()` method, as it requires concatenating a string with the attribute name
* More verbose syntax, which can make it harder to read and write

**Library: jQuery**

The library used in this benchmark is jQuery, a popular JavaScript library for DOM manipulation, event handling, and other tasks. The `data()` and `attr()` methods are part of the jQuery API.

**Special JS feature or syntax**

There isn't any special JavaScript feature or syntax being used in this benchmark beyond what's provided by jQuery and standard JavaScript. However, it's worth noting that some modern browsers have built-in support for custom data attributes, which can be accessed using the `getAttribute()` and `setAttribute()` methods.

**Other Alternatives**

If you're interested in exploring alternative approaches to setting and retrieving data with jQuery, you might consider:

* Using a library like Lodash or Underscore.js, which provide utility functions for working with data
* Implementing custom data storage mechanisms using JavaScript objects or other data structures
* Using server-side technologies like Node.js or Ruby on Rails to store and retrieve data

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36 Edg/119.0.0.0

Browser/OS: Chrome 119 on Windows

View result in a separate tab

Test name	Executions per second
jQuery + data	152817.6 Ops/sec
jQuery + attr data	148532.7 Ops/sec

Related benchmarks:

jQuery data VS jQuery attr data (version: 1)

Comparing performance of: jQuery + data vs jQuery + attr data

Created: 4 years ago by: Registered User

Jump to the latest result

jQuery + data

jQuery + attr data

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):