Run results for: Array.slice vs manual clone

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/105.0.0.0 Safari/537.36

Browser: Chrome 105

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
Array.slice	40920.8 Ops/sec
Manual copy	185.5 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;