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

Run details:

User agent: Mozilla/5.0 (Linux; Android 5.1.1; SAMSUNG SM-P600 Build/LMY47X) AppleWebKit/537.36 (KHTML, like Gecko) SamsungBrowser/6.2 Chrome/56.0.2924.87 Safari/537.36

Browser: Chrome 56

Operating system: Android 5.1.1

Device Platform: Samsung SM-P600

Date tested: 2024 years ago

Test name	Executions per second
Filter	99463.9 Ops/sec
For	19030.5 Ops/sec
For 2	19573.4 Ops/sec
For in	26073.9 Ops/sec
For of	44798.2 Ops/sec

Script Preparation code:

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

Tests:

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

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

This version declares i once before

Filter

For

For 2

For in

For of