Run results for: style vs style.cssText

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.102 Safari/537.36 Vivaldi/2.0.1309.37

Browser: Chrome 69

Operating system: Mac OS X 10.14.0

Device Platform: Desktop

Date tested: 5 years ago

Test name	Executions per second
style	16989.4 Ops/sec
style.cssText	18028.6 Ops/sec

Script Preparation code:

var a = document.createElement('div');
var b = document.createElement('div');
document.body.appendChild(a);
document.body.appendChild(b);

Tests:

style
a.style.fontSize = `${20 * Math.random()}px`; a.style.letterSpacing = `-${Math.random()}em`; a.style.wordSpacing = '0em'; a.getBoundingClientRect()
style.cssText
b.style.cssText = ` font-size: ${20 * Math.random()}px; letter-spacing: -${Math.random()}em; word-spacing: 0em; `; b.getBoundingClientRect();