Run results for: Array loop vs foreach vs map vs filter for update field in object

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; WOW64; Trident/7.0; rv:11.0) like Gecko

Browser: IE 11

Operating system: Windows

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
foreach	16873.6 Ops/sec
for	13400.1 Ops/sec
map	14236.2 Ops/sec
filter	15629.1 Ops/sec

Script Preparation code:

   var arr = [];
   for (var i = 0; i < 1000; i++) {
       arr[i] = {
           'id': i
       };
   }

   function someFn(i) {
       return i * 3 * 8;
   }

Tests:

foreach
arr.forEach(function (item){ item.data = someFn(item.id); })
for
for (var i = 0, len = arr.length; i < len; i++) { arr[i].data = someFn(arr[i].id); }
map
arr.map(function(item){ item.data=someFn(item.id); });
filter
arr.filter(function(item){ item.data=someFn(item.id); });