Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.192 Safari/537.36
Chrome 88
Mac OS X 10.15.7
Desktop
3 years ago
Test name Executions per second
for 4529.0 Ops/sec
foreach 360554.1 Ops/sec
some 370089.5 Ops/sec
for..of 7779.8 Ops/sec
for cached length 9271.8 Ops/sec
Script Preparation code:
AخA
 
var array = new Array(1000);
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];
    }
  • for cached length

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