Run results for: Classnames vs CLSX vs cx v2

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/141.0.0.0 Safari/537.36

Browser: Chrome 141

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 10 months ago

clsx

14.8M/s

classnames

6.3M/s

3.6M/s

View exact numbers

Test name	Executions per second
✓ clsx	14,844,247 Ops/sec
classnames	6,314,047 Ops/sec
cx	3,639,056 Ops/sec

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@1.1.1/dist/clsx.min.js'></script>
<script src="https://cdn.jsdelivr.net/npm/@emotion/css@11.13.4/dist/emotion-css.umd.min.js"></script>

Script Preparation code:

var c = {
    a: true,
    b: false,
    c: undefined,
    d: "lorem-ipsum"
};
var someClasses = ['class1', true || 'class2', false && 'class3', true ? 'class4' : 'class5', c]

Tests:

classnames
let result = window.classNames(someClasses)
clsx
let result = window.clsx(someClasses)
cx
let result = window.emotion.cx(someClasses)

Run results for: Classnames vs CLSX vs cx v2

Compare CLSX vs Classnames vs an simpliest implementation of creating a template string

classnames

clsx

cx