Benchmark: Classnames vs CLSX vs light-classnames

HTML Preparation code:


<script src="https://cdnjs.cloudflare.com/ajax/libs/classnames/2.2.6/index.min.js"></script>
<script src="https://unpkg.com/clsx@1.1.0/dist/clsx.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/light-classnames@0.0.3/dist/bundle.umd.min.js"></script>

Script Preparation code:

var str = 'style';
var obj = {
 	 'style-2': true,
  	 'style-3': false,
 	 'style-4': 9,
  	 'style-5': null
};
var number = 6;
var anotherStr = 'jigucha';
var moreObject = {a: undefined, b: 'asdf'}

Tests:

classnames
let result = window.classNames(str, obj, number, undefined, anotherStr, null, 0, moreObject)
clsx
let result = window.clsx(str, obj, number, undefined, anotherStr, null, 0, moreObject)
light-classnames
let result = window.lcn(str, obj, number, undefined, anotherStr, null, 0, moreObject)

Historical Performance Data aggregated from 11 community runs

Desktop Results:

Firefox 6 runs

light-classnames

2.6M/s

clsx

1.8M/s

classnames

1.7M/s

Fastest: light-classnames (1.5x faster)

View exact numbers

✓ light-classnames: 2,593,831 ops/sec
• clsx: 1,798,455 ops/sec
• classnames: 1,699,500 ops/sec

Chrome 5 runs

light-classnames

10.2M/s

clsx

6.7M/s

classnames

4.3M/s

Fastest: light-classnames (2.4x faster)

View exact numbers

✓ light-classnames: 10,229,917 ops/sec
• clsx: 6,662,438 ops/sec
• classnames: 4,347,852 ops/sec

Results show median performance across all community submissions. Run this benchmark yourself to verify on your device.

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
classnames
clsx
light-classnames

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/137.0.0.0 Safari/537.36

Browser/OS: Chrome 137 on Mac OS X 10.15.7

View result in a separate tab

light-classnames

13.6M/s

clsx

8.4M/s

classnames

7.3M/s

View exact numbers

Test name	Executions per second
✓ light-classnames	13,588,199 Ops/sec
clsx	8,418,081 Ops/sec
classnames	7,252,884 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's dive into the benchmark test case.

**Overview**

The benchmark tests three JavaScript libraries: `classnames`, `clsx`, and `light-classnames`. The test creates an object with multiple properties, including strings, numbers, booleans, and nulls. It then passes this object to each library along with a string and two numbers as arguments. The test measures the execution time for each library.

**Library Descriptions**

1. **classnames**: This library is designed to generate a space-separated string of class names from an object. It's often used in conjunction with CSS classes to style HTML elements.
2. **clsx**: This library provides a more concise way of writing class name strings using the `+` operator. It's similar to `classnames`, but with a different API.
3. **light-classnames**: This is the library being benchmarked, which seems to be a lightweight alternative to `classnames`.

**Options Compared**

The three libraries are compared in terms of their execution speed. The test measures the number of executions per second for each library.

**Pros and Cons**

*   **classnames**:
    *   Pros: Well-established library with a large user base, easy to use.
    *   Cons: May be slower than other alternatives due to its complexity.
*   **clsx**:
    *   Pros: More concise API, potentially faster execution speed due to reduced overhead.
    *   Cons: Smaller user base compared to `classnames`.
*   **light-classnames**:
    *   Pros: Lightweight alternative, potentially faster execution speed.
    *   Cons: May be less stable or have fewer features compared to other alternatives.

**Other Considerations**

*   **Browser Support**: The benchmark is run on Firefox 128, which may not support the latest features or optimizations in modern browsers. Running the test on different browsers may provide a more accurate picture of each library's performance.
*   **JavaScript Engine**: The JavaScript engine used by Firefox 128 may impact the execution speed of each library. Optimizations for specific engines can affect the results.

**Alternative Libraries**

If `classnames`, `clsx`, or `light-classnames` are not suitable for your use case, you might consider alternative libraries like:

*   **lodash classNames**: A lightweight version of `classnames` with a simpler API.
*   **css-selectors`: A library that generates CSS selectors from an object, potentially offering better performance and features compared to `classnames`.
*   **dom-class-list**: A library that generates a class list for HTML elements, which may be more suitable for specific use cases.

When choosing a library, consider factors like your project's requirements, the size of your user base, and any specific features or optimizations needed.

Classnames vs CLSX vs light-classnames (version: 5) Benchmark.js

In doing my new package light-classnames. I'm trying to see if my package is faster than the other two major competitors/

Comparing performance of: `classnames vs clsx vs light-classnames`

Created: 4 years ago by: Registered User

Go to the latest result

classnames

clsx

light-classnames

Historical Performance Data aggregated from 11 community runs

Desktop Results:

Firefox 6 runs

Chrome 5 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

Classnames vs CLSX vs light-classnames (version: 5) Benchmark.js

In doing my new package light-classnames. I'm trying to see if my package is faster than the other two major competitors/

Comparing performance of: classnames vs clsx vs light-classnames

Created: 4 years ago by: Registered User

Go to the latest result

classnames

clsx

light-classnames

Historical Performance Data aggregated from 11 community runs

Desktop Results:

Firefox 6 runs

Chrome 5 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

Related benchmarks

Comparing performance of: `classnames vs clsx vs light-classnames`