Run results for: Array filter vs. for loop - with for in 2

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.77 Safari/537.36

Browser: Chrome 91

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Script Preparation code:

var arr = [1,2,3,4,null,5,6,"7",8,{a:2},0], farr=[], i,len;

Tests:

Filter
farr= arr.filter(function(item) { return (item>4); });
For
farr = []; for (i=0,len=arr.length;i<len;i++) { if (arr[i]<5) continue; farr.push(arr[i]); }
For 2
farr = []; for(i=0,len=arr.length;i<len;i++) { if (arr[i]>4) farr.push(arr[i]); }
For in
farr = []; for(i in arr) { if (arr[i]>4) farr.push(arr[i]); }