Run results for: Variable vs array with one item

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.36

Browser: Chrome 133

Operating system: Linux

Device Platform: Desktop

Date tested: one year ago

Single element in variable

943K/s

Single element in array

938K/s

View exact numbers

Test name	Executions per second
✓ Single element in variable	943,042 Ops/sec
Single element in array	938,462 Ops/sec

Script Preparation code:

const variable = document.createElement("div")
const array = [document.createElement("div")]

function setVariable() {
	variable.setAttribute("style", `transform: translate3d(${Math.random()}px, ${Math.random()}px, ${Math.random()}px)`)
}

function setArray() {
	array.forEach((elem)=>{ elem.setAttribute("style", `transform: translate3d(${Math.random()}px, ${Math.random()}px, ${Math.random()}px)`) })
}

Tests:

Single element in variable
setVariable()
Single element in array
setArray()

Run results for: Variable vs array with one item

Testing the performance impact of an array when it only contains one item

Single element in variable

Single element in array