Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.131 Safari/537.36
Chrome 92
Mac OS X 10.15.7
Desktop
3 years ago
Test name Executions per second
foreach 2961126.8 Ops/sec
for in 3344721.0 Ops/sec
HTML Preparation code:
AخA
 
1
<script src="https://cdn.jsdelivr.net/lodash/4.16.0/lodash.min.js"></script>
Script Preparation code:
 
var values = [{a: 30310}, {b: 100303}, {c: 3040494}]
Tests:
  • foreach

     
    var count = 0;
    _.forEach(values, function(v,i) {
      if (v.a != null) {
        count++; 
      }
    })
  • for in

     
    var count = 0;
    for(var value in values) {
      if (value.a != null) {
        count++; 
      }
    }