Benchmark: joined classes jquery

HTML Preparation code:

<div class='test1'>
  <div class='test-child1 child1 child'></div>
</div>
<div class='test2'>
  <div class='test-child2 child2 child'></div>
</div>
<div class='test3'>
  <div class='test-child3 child3 child'></div>
</div>
<div class='test4'>
  <div class='test-child4 child4 child'></div>
</div>
<script src='https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js'></script>

Tests:

single class - getElementsByClassName?
jQuery('.test-child4')
two classes
jQuery('.test-child4.child4')
three classes
jQuery('.test-child4.child4.child')

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
single class - getElementsByClassName?
two classes
three classes

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 29 days ago):

LLMs can make mistakes. Check important info.

Let's break down the benchmark and explain what's being tested.

**Benchmark Overview**

The benchmark is designed to measure the performance of jQuery's `getElementsByClassName()` method under different conditions. Specifically, it tests how joining multiple classes to a selector affects performance.

**Script Preparation Code**

The script preparation code for this benchmark is empty (`null`). This means that no additional JavaScript code is executed before running the test cases.

**Html Preparation Code**

The HTML preparation code defines four identical `<div>` elements with different class names: `test1`, `test2`, `test3`, and `test4`. The class names have multiple levels of nesting, such as `child1`, `child2`, etc. These elements are used as targets for the jQuery selector tests.

**Individual Test Cases**

There are three test cases:

1. **Single Class - getElementsByClassName?**: Tests how fast jQuery can find an element with a single class name (`class='test-child4'`).
2. **Two Classes**: Tests how fast jQuery can find an element with two class names combined (`class='test-child4 child'`).
3. **Three Classes**: Tests how fast jQuery can find an element with three class names combined (`class='test-child4.child child'`).

**Library: jQuery**

The library being used is jQuery, a popular JavaScript library for DOM manipulation and event handling. In this benchmark, jQuery's `getElementsByClassName()` method is the focus of performance testing.

**Pros and Cons of Different Approaches**

Here are some pros and cons of different approaches:

* **Single Class**: This approach tests the fastest way to select an element with a single class name.
	+ Pros: Simple, straightforward test case.
	+ Cons: May not reflect real-world scenarios where multiple classes are used.
* **Two Classes**: This approach tests how fast jQuery can handle two class names combined.
	+ Pros: More realistic than single-class test, as it reflects common use cases.
	+ Cons: May be slower due to additional complexity.
* **Three Classes**: This approach tests the fastest way to select an element with three class names combined.
	+ Pros: Similar to the two-classes test, but with more nesting levels.
	+ Cons: May be even slower than the two-classes test.

**Other Considerations**

When interpreting these results, consider that:

* The benchmark is running on a desktop device (Mac OS X 10.15.7) with Chrome 94 browser.
* The test cases are designed to measure performance under different conditions, rather than accuracy or code quality.

**Alternatives**

If you're interested in exploring other benchmarks or testing libraries, consider the following alternatives:

* Browserbench: A benchmarking platform that tests various web technologies, including JavaScript and DOM manipulation.
* jsPerf: A web-based benchmarking tool specifically designed for measuring JavaScript performance.
* Benchmarking frameworks like Benchmark.js or Fast-est: These tools allow you to create custom benchmarks for your specific use cases.

Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/94.0.4606.61 Safari/537.36

Browser/OS: Chrome 94 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
single class - getElementsByClassName?	636848.4 Ops/sec
two classes	352164.6 Ops/sec
three classes	357042.2 Ops/sec

Related benchmarks:

joined classes jquery (version: 0)

does joining more classes to a selector make it less performant?

Comparing performance of: single class - getElementsByClassName? vs two classes vs three classes

Created: 3 years ago by: Guest

Jump to the latest result

single class - getElementsByClassName?

two classes

three classes

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 29 days ago):