Run results for: Array.slice vs manual clone

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 15_4 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/15.4 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 15

Operating system: iOS 15.4

Device Platform: Mobile

Date tested: 2 years ago

Test name	Executions per second
Array.slice	13211.1 Ops/sec
Manual copy	121.4 Ops/sec

Script Preparation code:

var arr=(function(){
	var arr=[];
	for(var i=0; i<80000; i++){
		arr.push(i);
    }
	return arr;
}())

Tests:

Array.slice
var arr2=arr.slice(); return arr2;
Manual copy
var arr3=new Array(arr.length); for(var i=0; i<arr.length; i++){ arr3[i]=arr[i]; } return arr3;