Run results for: index loop vs for-of loop vs foreach vs map

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:60.0) Gecko/20100101 Firefox/60.0

Browser: Firefox 60

Operating system: Mac OS X 10.12

Device Platform: Desktop

Date tested: 5 years ago

Script Preparation code:

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

Tests: