Run results for: ForIn vs ForEach

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0

Browser: Firefox 81

Operating system: Windows

Device Platform: Desktop

Date tested: 4 years ago

Script Preparation code:

   var arr = [];
   for (var i = 0; i < 10000; i++) {
       arr[i] = i;
   }

   function someFn(i) {
       return i * 2;
   }

Tests: