Benchmark: Selector performance in JQuery 3

HTML Preparation code:

<div id="my-id">
    <div class="grand">
        <div class="parent"> Awesome stuff! </div>
        <div class="my-class">
            <p> I like carrots! </p>
        </div>
    </div>
</div>
<script src='https://code.jquery.com/jquery-3.4.1.min.js'></script>

Script Preparation code:

$('div#my-id div.grand div.parent div.my-class')
$('#my-id .grand .parent div.my-class')
$('#my-id .grand .parent .my-class')
$('.my-class')
document.getElementsByClassName('my-class')
$('div.my-class')
$('#my-id').find('.my-class')
jQuery('.my-class')
jQuery('#my-id').find('.my-class')

Tests:

1
$('div#my-id div.grand div.parent div.my-class')
2
$('#my-id .grand .parent div.my-class')
3
$('#my-id .grand .parent .my-class')
4
$('.my-class')
5
document.getElementsByClassName('my-class')
6
$('div.my-class')
7
$('#my-id').find('.my-class')
8
jQuery('.my-class')
9
jQuery('#my-id').find('.my-class')

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
1
2
3
4
5
6
7
8
9

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 25 days ago):

LLMs can make mistakes. Check important info.

I'll break down the provided benchmark and explain what's being tested, the options compared, their pros and cons, and other considerations.

**Benchmark Definition**

The benchmark definition is provided in two formats: JavaScript code and HTML code. Both codes are used to select elements on a webpage using various methods.

1. **JavaScript Code**
```javascript
$('div#my-id div.grand div.parent div.my-class')
$('#my-id .grand .parent div.my-class')
$('#my-id .grand .parent .my-class')
$('.my-class')
document.getElementsByClassName('my-class')
$('div.my-class')
$('#my-id').find('.my-class')
jQuery('.my-class')
jQuery('#my-id').find('.my-class')
```
These lines of code use the jQuery library to select elements with specific classes, IDs, and tag names.

2. **HTML Code**
```html
<div id="my-id">
    <div class="grand">
        <div class="parent">Awesome stuff!</div>
        <div class="my-class">
            <p>I like carrots!</p>
        </div>
    </div>
</div>
<script src='https://code.jquery.com/jquery-3.4.1.min.js'></script>
```
This HTML code defines a simple webpage structure with an ID, classes, and tags.

**Test Cases**

The benchmark consists of 9 test cases, each testing a different method for selecting elements:

1. `$('div#my-id div.grand div.parent div.my-class')` - Using the `#id` selector
2. `$('#my-id .grand .parent div.my-class')` - Using the `.class` selector on an ID element
3. `$('#my-id .grand .parent .my-class')` - Using multiple `.class` selectors on an ID element
4. `$('.my-class')` - Using a class selector without an ID or tag name
5. `document.getElementsByClassName('my-class')` - Using the native `getElementsByClassName()` method
6. `$('div.my-class')` - Using a shorthand attribute selector
7. `$('#my-id').find('.my-class')` - Using the `.find()` method on an ID element
8. `jQuery('.my-class')` - Using the jQuery library's class selector
9. `jQuery('#my-id').find('.my-class')` - Using the jQuery library's `.find()` method on an ID element

**Options Compared**

Each test case is compared to measure their performance, speed, and efficiency.

**Pros and Cons**

Here are some pros and cons of each testing method:

1. `$('div#my-id div.grand div.parent div.my-class')`:
	* Pros: Fast and efficient for IDs.
	* Cons: Can be slower for class selectors without an ID or tag name.
2. `$('#my-id .grand .parent div.my-class')`:
	* Pros: Good performance for class selectors on ID elements.
	* Cons: May be slower than using a single `.class` selector.
3. `$('#my-id .grand .parent .my-class')`:
	* Pros: Fast for multiple class selectors on an ID element.
	* Cons: Can be slower for single `.class` selectors.
4. `$('.my-class')`:
	* Pros: Good performance for class selectors without an ID or tag name.
	* Cons: May be slower than using a shorthand attribute selector.
5. `document.getElementsByClassName('my-class')`:
	* Pros: Native method, fast, and efficient.
	* Cons: May not support all browsers or older versions.
6. `$('div.my-class')`:
	* Pros: Fast for shorthand attribute selectors.
	* Cons: Limited to single attribute selection.
7. `$('#my-id').find('.my-class')`:
	* Pros: Good performance for `.find()` on ID elements.
	* Cons: May be slower than using a direct class selector.
8. `jQuery('.my-class')`:
	* Pros: Fast and efficient for jQuery's class selectors.
	* Cons: Requires the jQuery library.
9. `jQuery('#my-id').find('.my-class')`:
	* Pros: Good performance for `.find()` on ID elements using jQuery.
	* Cons: Requires the jQuery library.

**Other Considerations**

1. **Browser Support**: Each testing method may have varying levels of support across different browsers and older versions.
2. **Efficiency**: Some methods, like `document.getElementsByClassName('my-class')`, are generally more efficient than others, like using jQuery's class selector.
3. **Readability and Maintainability**: The choice of testing method should also consider readability and maintainability, as some methods may be easier to understand or modify than others.

By understanding the differences between these testing methods, you can choose the best approach for your specific use case and optimize performance accordingly.

Latest run results:

Run details: (Test run date: 5 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/76.0.3809.87 Safari/537.36

Browser/OS: Chrome 76 on Windows

View result in a separate tab

Test name	Executions per second
1	105741.5 Ops/sec
2	105511.4 Ops/sec
3	115064.6 Ops/sec
4	163942.7 Ops/sec
5	1628539.9 Ops/sec
6	95635.9 Ops/sec
7	117628.5 Ops/sec
8	161900.4 Ops/sec
9	121829.8 Ops/sec

Related benchmarks:

Selector performance in JQuery 3 (version: 9)

Comparing performance of: 1 vs 2 vs 3 vs 4 vs 5 vs 6 vs 7 vs 8 vs 9

Created: 5 years ago by: Registered User

Jump to the latest result

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9

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 25 days ago):