Benchmark: Classnames vs CLSX vs fast-

HTML Preparation code:


<script src='https://cdnjs.cloudflare.com/ajax/libs/classnames/2.3.2/index.min.js'></script>
<script src='https://unpkg.com/clsx@1.2.1/dist/clsx.min.js'></script>
<script src="https://cdn.jsdelivr.net/npm/fast-classnames/umd.min.js"></script>

Script Preparation code:

var str = 'style';
var obj = {
 	 'style-2': true,
  	 'style-3': false,
 	 'style-4': true,
}
var arr = ['style-5', 'style-6']

Tests:

classnames string
let result = window.classNames(str, 'test classname', 'WORKS')
clsx string
let result = window.clsx(str, 'test classname', 'WORKS')
classnames object
let result = window.classNames(obj, {'test classname':false, 'WORKS':true})
clsx object
let result = window.clsx(obj, {'test classname':false, 'WORKS':true})
classnames array
let result = window.classNames(arr, ['test classname', ['WORKS']])
clsx array
let result = window.clsx(arr, ['test classname', ['WORKS']])
Fast-ClassNames string
let result = window.fastClassnames(str, 'test classname', 'WORKS')
Fast-ClassNames object
let result = window.fastClassnames(obj, {'test classname':false, 'WORKS':true})
Fast-ClassNames array
let result = window.fastClassnames(arr, ['test classname', ['WORKS']])

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
classnames string
clsx string
classnames object
clsx object
classnames array
clsx array
Fast-ClassNames string
Fast-ClassNames object
Fast-ClassNames array

Fastest: N/A

Slowest: N/A

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/109.0.0.0 Safari/537.36

Browser/OS: Chrome 109 on Windows

View result in a separate tab

Test name	Executions per second
classnames string	3757669.2 Ops/sec
clsx string	5189514.0 Ops/sec
classnames object	2996509.5 Ops/sec
clsx object	3509858.2 Ops/sec
classnames array	1213578.1 Ops/sec
clsx array	3305647.8 Ops/sec
Fast-ClassNames string	3468793.5 Ops/sec
Fast-ClassNames object	3217370.2 Ops/sec
Fast-ClassNames array	2916898.2 Ops/sec

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

LLMs can make mistakes. Check important info.

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

**Benchmark Overview**

The benchmark is designed to compare the performance of three different libraries: Classnames, CLSX (also known as clsx), and Fast-ClassNames. The tests focus on various scenarios such as string, object, and array inputs.

**Library Descriptions**

1. **Classnames**: A lightweight library for conditionally joining strings with classes.
2. **CLSX (clsx)**: A fast and flexible library for conditionally joining strings with classes. It's known for its speed and versatility.
3. **Fast-ClassNames**: A high-performance library specifically designed for class naming, which is a critical part of CSS styling.

**Test Cases**

The benchmark consists of 8 test cases, each testing one of the libraries in different scenarios:

1. **String Input**: Testing the performance of each library when taking a string as input.
2. **Object Input**: Testing the performance of each library when taking an object as input.
3. **Array Input**: Testing the performance of each library when taking an array as input.

**Options Compared**

Each test case compares the performance of one library against another. For example:

* `classnames string` vs `clsx string`
* `classNames(obj, {'test classname':false, 'WORKS':true})` vs `clsx(obj, {'test classname':false, 'WORKS':true})`

**Pros and Cons**

Here's a brief summary of the pros and cons of each library:

1. **Classnames**: Lightweight, easy to use, but might not be as fast as CLSX or Fast-ClassNames.
2. **CLSX (clsx)**: Fast, flexible, and widely used, but might have some overhead due to its additional features.
3. **Fast-ClassNames**: High-performance, specifically designed for class naming, but might require more setup and configuration.

**Performance Comparison**

The benchmark results show that CLSX (clsx) is generally the fastest library in all test cases, followed closely by Fast-ClassNames. Classnames tends to be slower due to its lightweight nature.

**Conclusion**

In conclusion, this benchmark provides a comprehensive comparison of three popular libraries for class naming: Classnames, CLSX (clsx), and Fast-ClassNames. The results suggest that CLSX (clsx) is the fastest library, followed by Fast-ClassNames. While Classnames is still a viable option, it might not be the best choice for high-performance applications.

Related benchmarks:

Classnames vs CLSX vs fast- (version: 0)

Compare CLSX vs Classnames vs templateLiterals

Comparing performance of: classnames string vs clsx string vs classnames object vs clsx object vs classnames array vs clsx array vs Fast-ClassNames string vs Fast-ClassNames object vs Fast-ClassNames array

Created: 2 years ago by: Guest

Jump to the latest result

classnames string

clsx string

classnames object

clsx object

classnames array

clsx array

Fast-ClassNames string

Fast-ClassNames object

Fast-ClassNames array

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):