Run results for: 7 properties - style.setProperty vs style.cssText vs style vs Object.assign vs setAttribute.

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/94.0.4606.85 YaBrowser/21.11.3.795 (beta) Yowser/2.5 Safari/537.36

Browser: Yandex Browser 21

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
style.setProperty	12.7 Ops/sec
style.cssText	17.4 Ops/sec
style replace	14.8 Ops/sec
Object.assign	12.8 Ops/sec
setAttribute	13.8 Ops/sec
style update	11.2 Ops/sec
style.cssText update	6.8 Ops/sec

HTML Preparation code:

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

Script Preparation code:

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", i/100 + "%"); 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:${i/100}%;`; i++; }
style replace
let i = 0; while (i < 10000) { el.style = `color:red;border:1vmin solid red;padding:0.5vmin;background-color:black;height:1vh;width:${i/100}%;`; i++; }
Object.assign
let i = 0; while (i < 10000) { Object.assign(el.style, { height: '1vh', width: i/100 + '%', color: 'red', border: '1vmin solid red', backgroundColor: 'black', padding: '0.5vmin' }); 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:${i/100}%;`); i++; }
style update
let i = 0; while (i < 10000) { el.style.color = "red"; el.style.border = "1vmin solid red"; el.style.padding = "0.5vmin"; el.style.backgroundColor = "black"; el.style.height = "1vh"; el.style.width = i/100 + "%"; i++; }
style.cssText update
let i = 0; while (i < 10000) { el.style.cssText += ';' + `color:red;border:1vmin solid red;padding:0.5vmin;background-color:black;height:1vh;width:${i/100}%;`; i++; }

Run results for: 7 properties - style.setProperty vs style.cssText vs style vs Object.assign vs setAttribute.

style.setProperty

style.cssText

style replace

Object.assign

setAttribute

style update

style.cssText update