Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:64.0) Gecko/20100101 Firefox/64.0
Firefox 64
Mac OS X 10.14
Desktop
6 years ago
Test name Executions per second
for 1237286.5 Ops/sec
foreach 8963975.0 Ops/sec
some 9011027.0 Ops/sec
for..of 121746.3 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(i) {
      array[i];
    });
  • some

     
    array.some(function(i) {
      array[i];
    });
  • for..of

     
    for (var i of array) {
      array[i];
    }