Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.69 Safari/537.36
Chrome 89
Windows
Desktop
4 years ago
Test name Executions per second
for 77603.6 Ops/sec
foreach 151417.7 Ops/sec
for (cached length) 152504.2 Ops/sec
for..of 149640.0 Ops/sec
Script Preparation code:
AخA
 
var array = new Array(100);
for (var i = 0; i < array.length; i++) {
  array[i] = i * 10000
}
Tests:
  • for

     
    for (let i = 0; i < array.length; i++) {
      array[i] + 1
    }
  • foreach

     
    array.forEach((i) => {
      array[i] + 1
    });
  • for (cached length)

     
    for (let i = 0, length = array.length; i < length; i++) {
      array[i] + 1
    }
  • for..of

     
    for (var i of array) {
      array[i] + 1
    }