Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Firefox/78.0
Firefox 78
Windows
Desktop
3 years ago
Test name Executions per second
for 125156.8 Ops/sec
foreach 986749.8 Ops/sec
some 1077035.9 Ops/sec
for..of 10113.7 Ops/sec
for cached length 289782.5 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];
    }