Run results for: Array slice() vs slice(0) vs spread operator

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 17_7_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.8.1 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 17

Operating system: iOS 17.7.2

Device Platform: Mobile

Date tested: 3 months ago

Test name	Executions per second
Array.prototype.slice()	22911196.0 Ops/sec
spread operator	12452964.0 Ops/sec
Array.prototype.slice(0)	22566454.0 Ops/sec

Script Preparation code:

var baseArray = []
for (var i = 0; i < 50; i++) {
  baseArray.push((Math.floor(Math.random() * Math.floor(1000000))).toString(16)) 
}

Tests:

Array.prototype.slice()
var other = baseArray.slice();
spread operator
var other = [ ...baseArray ]
Array.prototype.slice(0)
var other = baseArray.slice(0);

Run results for: Array slice() vs slice(0) vs spread operator

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

Array.prototype.slice()

spread operator

Array.prototype.slice(0)