Run results for: Clone and append to beginning of array

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:128.0) Gecko/20100101 Firefox/128.0

Browser: Firefox 128

Operating system: Windows

Device Platform: Desktop

Date tested: one month ago

Test name	Executions per second
Array.prototype.toSpliced	18843600.0 Ops/sec
Array.prototype.slice + Array.prototype.unshift	15991050.0 Ops/sec
Spread operator	20711540.0 Ops/sec

Script Preparation code:

var array = ["hello", true, 7];
var newElement = "new";

Tests:

Array.prototype.toSpliced
const newArray = array.toSpliced(0, 0, newElement);
Array.prototype.slice + Array.prototype.unshift
const newArray = array.slice(); newArray.unshift(newElement);
Spread operator
const newArray = [newElement, ...array];