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

Run details:

User agent: Mozilla/5.0 (Linux; Android 12; SM-A725F) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.4844.51 Mobile Safari/537.36 EdgA/99.0.1150.39

Browser: Chrome Mobile 99

Operating system: Android

Device Platform: Mobile

Date tested: 2 years ago

Test name	Executions per second
Filter	1795345.0 Ops/sec
For	259024.6 Ops/sec
For 2	230001.4 Ops/sec
For in	205138.9 Ops/sec

Script Preparation code:

var arr = [1,2,3,4,5,6,7,8,9,0], farr;

Tests:

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

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

Filter

For

For 2

For in