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

Run details:

User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/110.0

Browser: Firefox 110

Operating system: Ubuntu

Device Platform: Desktop

Date tested: one year ago

Script Preparation code:

var arr = Array.from(Array(100000), () => (Math.random() * 10) |0)

Tests:

Filter
arr.filter(function(item) { return (item>4); });
For
let farr=[]; for (var i=0,len=arr.length;i<len;i++) { if (arr[i]>4) farr.push(arr[i]); }
In place for
let farr=[]; let next = 0; for (var i=0,len=arr.length;i<len;i++) { if (arr[i]>4) farr[next++] = arr[i]; } farr.splice(next);
in place, temp var for value
let farr=[]; let next = 0; for (var i=0,len=arr.length;i<len;i++) { let val = arr[i] if (val>4) farr[next++] = val; } farr.splice(next);
filter, arrow funcs
arr.filter(item => item>4)