MeasureThat.net

Run results for: for vs forEach vs for-of vs for-reverse (short array summing 2)

for vs forEach vs for-of vs for-reverse

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Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.175 Safari/537.36
Chrome 96
Windows
Desktop
3 years ago
Test name Executions per second
for 275678.3 Ops/sec
forEach 3758591.5 Ops/sec
for-of 4447812.0 Ops/sec
for-reverse 498733.1 Ops/sec
for with cached length 429572.0 Ops/sec
Script Preparation code:
AخA
 
var array = Array.from({length: 10}, (_, index) => index);
Tests:

  • for

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

  • forEach

     
    var sum = 0
    array.forEach(function(item) {
      sum += item;
    });

  • for-of

     
    var sum = 0
    for (var item of array) {
      sum += item;
    }

  • for-reverse

     
    var sum = 0
    for (var i = array.length; i--;) {
      sum += array[i];
    }

  • for with cached length

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