Benchmark: Classnames vs CLSX @ 2023-02-15

HTML Preparation code:


<script src='https://unpkg.com/classnames@2.3.2/index.js'></script>
<script src='https://unpkg.com/clsx@1.2.1/dist/clsx.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
let result = window.classNames(str, obj, arr, 'test classname')
clsx
let result = window.clsx(str, obj, arr, 'test classname')
Array based
function ts(...args){ let template = []; args.forEach(arg => { if (typeof arg === 'string') { template.push(arg); return; } if (arg.join) { template = [...template, ...arg]; return; } let entries = Object.entries(arg); if (entries.length) { entries.forEach(entry => { if(entry[1]) template.push(entry[0]) }) } }) return template.join(' '); } let result = ts(str, obj, arr, 'test classname')
String based (return struct)
function ts(...args){ let template = ''; args.forEach(arg => { if (typeof arg === 'string') { template += ' '+arg; return; } if (arg.join) { arg.forEach((e) => { template += ' ' + e; }) return; } let entries = Object.entries(arg); if (entries.length) { entries.forEach(entry => { if(entry[1]) template += ' ' + entry[0] }) } }) return template; } let result = ts(str, obj, arr, 'test classname')
String based (if-else struct)
function ts(...args){ let template = ''; args.forEach(arg => { if (typeof arg === 'string') { template += ' '+arg; } else if (arg.join) { arg.forEach((e) => { template += ' ' + e; }) } else { let entries = Object.entries(arg); if (entries.length) { entries.forEach(entry => { if(entry[1]) template += ' ' + entry[0] }) } } }) return template; } let result = ts(str, obj, arr, 'test classname')
Entries, filter, map, join
let objStyle = Object.entries(obj).filter((style)=>style[1]).map(style => style[0]).join(' '); let arrComb = arr.join(' ') let result = `${str} ${objStyle} ${arrComb} test classname`

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
classnames
clsx
Array based
String based (return struct)
String based (if-else struct)
Entries, filter, map, join

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36

Browser/OS: Chrome 120 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
classnames	3346118.5 Ops/sec
clsx	4819606.5 Ops/sec
Array based	3427542.5 Ops/sec
String based (return struct)	4555700.5 Ops/sec
String based (if-else struct)	4549455.0 Ops/sec
Entries, filter, map, join	4075785.2 Ops/sec

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

LLMs can make mistakes. Check important info.

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

**Benchmark Overview**

The benchmark compares the performance of three different approaches to concatenate CSS classes: `classnames`, `clsx`, and two custom implementations (`Array based` and `String based (if-else struct)`). The test case uses a JavaScript object `obj` with nested properties, an array `arr` containing strings, and a string `str`.

**What's being tested?**

The benchmark tests the execution time of each approach to concatenate the CSS classes. Specifically:

* `classnames`: A library that provides a concise way to concatenate multiple class names.
* `clsx`: Another library that offers similar functionality to `classnames`.
* `Array based` and `String based (if-else struct)`: Two custom implementations that use arrays and conditional statements to concatenate the CSS classes.

**Options Compared**

The benchmark compares the performance of:

1. `classnames` vs. `clsx`
2. Two custom approaches:
	* `Array based`: Uses an array to store the class names and concatenates them using the `join()` method.
	* `String based (if-else struct)`: Uses conditional statements to check if each value is a string or has a `join()` method, and then concatenates the classes accordingly.

**Latest Benchmark Results**

The latest benchmark results show that:

1. `clsx` performs best with an average of 4555700.5 executions per second.
2. The custom implementation `String based (if-else struct)` is significantly slower than `clsx`, with an average of 4075785.25 executions per second.
3. The custom implementation `Array based` has the slowest performance, with an average of 3427542.5 executions per second.

**Insights**

* The benchmark suggests that both `classnames` and `clsx` are well-optimized libraries for concatenating CSS classes.
* The custom implementations have room for improvement to achieve better performance.
* The choice between the two custom approaches depends on personal preference, code readability, and maintainability.

Related benchmarks:

Classnames vs CLSX @ 2023-02-15 (version: 0)

Comparing performance of: classnames vs clsx vs Array based vs String based (return struct) vs String based (if-else struct) vs Entries, filter, map, join

Created: 3 years ago by: Guest

Jump to the latest result

classnames

clsx

Array based

String based (return struct)

String based (if-else struct)

Entries, filter, map, join

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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