MeasureThat.net

Run results for: _.isEmpty vs Object.keys.length vs for in

Go to the benchmark
Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.4844.74 Safari/537.36 Edg/99.0.1150.55
Chrome 99
Windows
Desktop
2 years ago
Test name Executions per second
_.isEmpty 3089398.2 Ops/sec
Object.keys().length 798597.3 Ops/sec
isEmpty(window.obj) 4562369.0 Ops/sec
HTML Preparation code:
AخA
 
1
<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.4/lodash.min.js"></script>
Script Preparation code:
​x
 
window.obj = {};
​
for (var i = 0, len = 100; i < len; i++) {
  obj['key' + i] = 'value' + i;
}
​
function isEmpty(obj) { 
   for (let x in obj) { return false; }
   return true;
}
Tests:

  • _.isEmpty

     
    _.isEmpty(window.obj);

  • Object.keys().length

     
    Object.keys(window.obj).length === 0;

  • isEmpty(window.obj)

     
    isEmpty(window.obj)