Benchmark: forEach, for, map

Script Preparation code:

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

Tests:

forEach
arr.forEach(function (item){ someFn(item); })
map
arr.map(item => someFn(item))
for
var len = arr.length; for (var i = 0; i < len; i++) { someFn(arr[i]); }
for 2
var len = arr.length; for (var i = len -1 ; i >= 0; i--) { someFn(arr[i]); }

Rendered benchmark preparation results:

Previous results

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Latest run results:

Run details: (Test run date: 6 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 Safari/537.36

Browser/OS: Chrome 68 on Mac OS X 10.13.6

forEach, for, map (version: 0)