Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:65.0) Gecko/20100101 Firefox/65.0
Firefox 65
Mac OS X 10.14
Desktop
6 years ago
Test name Executions per second
for 1330842.6 Ops/sec
foreach 9733928.0 Ops/sec
some 9717173.0 Ops/sec
Script Preparation code:
AخA
 
var array = new Array(100);
Tests:
  • for

     
    for (var i = 0; i < array.length; i++) {
      array[i];
    }
  • foreach

     
    array.forEach(function(item, index) {
      return item;
    });
  • some

     
    array.some(function(item, index) {
      return item === array[index];
    });