Run results for: CSS calc() + var()

Run details:

User agent: Mozilla/5.0 (Android 13; Mobile; rv:125.0) Gecko/125.0 Firefox/125.0

Browser: Firefox Mobile 125

Operating system: Android

Device Platform: Mobile

Date tested: 2 years ago

Percentage

86/s

79/s

var(unitless) + calc() + %

77/s

var(px) + calc()

72/s

var(%) + calc()

63/s

var(unitless) + calc() + px

63/s

View exact numbers

Test name	Executions per second
✓ Percentage	86 Ops/sec
px	79 Ops/sec
var(unitless) + calc() + %	77 Ops/sec
var(px) + calc()	72 Ops/sec
var(%) + calc()	63 Ops/sec
var(unitless) + calc() + px	63 Ops/sec

HTML Preparation code:

<section id="section"></section>

Script Preparation code:

const section = document.getElementById("section");

section.style.setProperty('--translation', '100');
section.style.setProperty('--translationPx', '100px');
section.style.setProperty('--translationPercentage', '100%');


for (var i = 0; i < 1000; i++) {
    const newDiv = document.createElement("div");
    const text = document.createTextNode(`${i}`);
    newDiv.appendChild(text);
    section.appendChild(newDiv);
}

var nodes = document.querySelectorAll("div");

Tests:

var(unitless) + calc() + %
for (var i = 0; i < nodes.length; i++) { nodes[i].style = "transform: translateY(calc(var(--translation) * 1%))" }
var(%) + calc()
for (var i = 0; i < nodes.length; i++) { nodes[i].style = "transform: translateY(var(--translationPercent))" }
Percentage
for (var i = 0; i < nodes.length; i++) { nodes[i].style = "transform: translateY(100%))" }
var(unitless) + calc() + px
for (var i = 0; i < nodes.length; i++) { nodes[i].style = "transform: translateY(calc(var(--translation) * 1px))" }
px
for (var i = 0; i < nodes.length; i++) { nodes[i].style = "transform: translateY(100px))" }
var(px) + calc()
for (var i = 0; i < nodes.length; i++) { nodes[i].style = "transform: translateY(calc(var(--translationPx)))" }