MeasureThat.net

Run results for: IE11 Object.entries

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Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36
Chrome 131
Windows
Desktop
4 months ago
Test name Executions per second
Object.entries 88355.5 Ops/sec
Object.keys 267510.1 Ops/sec
Script Preparation code:
​x
 
if(!Object.entries) {
    Object.entries = function(obj) {
        return Object.keys(obj).reduce(function(arr, key) {
            arr.push([key, obj[key]]);
            return arr;
        }, []);
    }
}
function makeid() {
  var text = "";
  var possible = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
​
  for (var i = 0; i < 5; i++)
    text += possible.charAt(Math.floor(Math.random() * possible.length));
​
  return text;
}
​
window.parentObj = {};
​
for (let i = 0; i < 100; i++) {
    window.parentObj[makeid()] = makeid();
}
​
​
Tests:

  • Object.entries

     
    var newObj = {};
    Object.entries(window.parentObj).forEach(([k, v], i) => {
      if ((i % 2) === 0) {
        newObj[k] = v;    
      }
    });

  • Object.keys

     
    var newObj = {};
    Object.keys(window.parentObj).forEach((k, i) => {
      if ((i % 2) === 0) {
        newObj[k] = window.parentObj[k];    
      }
    });