Run results for: Array filter vs. for loop and for in

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/132.0.0.0 Safari/537.36

Browser: Chrome 132

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 3 months ago

Script Preparation code:

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

AخA
 
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); });
farr= arr.filter(function(item) {
return (item);
});
For
farr = []; for (i=0,len=arr.length;i<len;i++) { farr.push(arr[i]); }
farr = [];
for (i=0,len=arr.length;i<len;i++) {
farr.push(arr[i]);
}
For in
farr = []; for(i in arr) { farr.push(arr[i]); }
farr = [];
for(i in arr) {
farr.push(arr[i]);
}