Run results for: 6 properties - style.setProperty vs style.cssText vs style vs Object.assign vs Object.entries with style.cssText vs setAttribute

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.0.0 Safari/537.36

Browser: Chrome 103

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
style.setProperty	11.0 Ops/sec
style.cssText	20.5 Ops/sec
style	17.2 Ops/sec
Object.assign	9.5 Ops/sec
setAttribute	19.0 Ops/sec
Object.entries with style.cssText	13.6 Ops/sec

HTML Preparation code:

<div id="test"></div>

AخA
 
<div id="test"></div>

Script Preparation code:

el = document.getElementById("test");

 
el = document.getElementById("test");

Tests:

style.setProperty
let i = 0; while (i < 10000) { el.style.setProperty("color","red"); el.style.setProperty("border","1vmin solid red"); el.style.setProperty("padding","0.5vmin"); el.style.setProperty("background-color","black"); el.style.setProperty("height","1vh"); el.style.setProperty("width","1vw"); i++; }
x

let i = 0;

while (i < 10000) {
el.style.setProperty("color","red");
el.style.setProperty("border","1vmin solid red");
el.style.setProperty("padding","0.5vmin");
el.style.setProperty("background-color","black");
el.style.setProperty("height","1vh");
el.style.setProperty("width","1vw");
i++;
}
style.cssText
let i = 0; while (i < 10000) { el.style.cssText = "color:red;border:1vmin solid red;padding:0.5vmin;background-color:black;height:1vh;width:1vw;"; i++; }
let i = 0;

while (i < 10000) {
el.style.cssText = "color:red;border:1vmin solid red;padding:0.5vmin;background-color:black;height:1vh;width:1vw;";
i++;
}

style

let i = 0;

while (i < 10000) {
  el.style = "color:red;border:1vmin solid red;padding:0.5vmin;background-color:black;height:1vh;width:1vw;";
  i++;
}

 
let i = 0;​while (i < 10000) {  el.style = "color:red;border:1vmin solid red;padding:0.5vmin;background-color:black;height:1vh;width:1vw;";  i++;}

Object.assign

let style = {
  height: '1vh',
  width: '1vw',
  color: 'red',
  border: '1vmin solid red',
  backgroundColor: 'black',
  padding: '0.5vmin'
};
let i = 0;

while (i < 10000) {
  Object.assign(el.style, style);
  i++;
}

 
let style = {  height: '1vh',  width: '1vw',  color: 'red',  border: '1vmin solid red',  backgroundColor: 'black',  padding: '0.5vmin'};let i = 0;​while (i < 10000) {  Object.assign(el.style, style);  i++;}

setAttribute
let i = 0; while (i < 10000) { el.setAttribute('style',"color:red;border:1vmin solid red;padding:0.5vmin;background-color:black;height:1vh;width:1vw;"); i++; }
let i = 0;

while (i < 10000) {
el.setAttribute('style',"color:red;border:1vmin solid red;padding:0.5vmin;background-color:black;height:1vh;width:1vw;");
i++;
}

Object.entries with style.cssText

let style = {
  height: '1vh',
  width: '1vw',
  color: 'red',
  border: '1vmin solid red',
  backgroundColor: 'black',
  padding: '0.5vmin'
};
let i = 0;

while (i < 10000) {
  let cssText = Object.entries(style).reduce((acc, [key, value]) => {
    acc += `${key}: ${value};`
    return acc;
  }, '');	
  el.style.cssText = cssText;
  i++;
}

 
let style = {  height: '1vh',  width: '1vw',  color: 'red',  border: '1vmin solid red',  backgroundColor: 'black',  padding: '0.5vmin'};let i = 0;​while (i < 10000) {  let cssText = Object.entries(style).reduce((acc, [key, value]) => {    acc += `${key}: ${value};`    return acc;  }, '');     el.style.cssText = cssText;  i++;}