Run results for: slice vs spread performance

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.0.0 Safari/537.36

Browser: Chrome 116

Operating system: Linux

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
Array.prototype.slice	18912344.0 Ops/sec
spread operator	471576.9 Ops/sec

Script Preparation code:

var params = Array.from({
    length: 123
}, () => ({
    a1: Math.random(),
    a2: Math.random(),
    a3: Math.random(),
    qwer: `Hello ${Math.random()}`
}))

Tests:

Array.prototype.slice
const other = params.slice();
spread operator
const other = [ ...params ]

Run results for: slice vs spread performance

Compare the new ES6 spread operator with the traditional slice() method

Array.prototype.slice

spread operator