Run results for: Object.entries VS Object.keys for count

Run details:

User agent: Mozilla/5.0 (Android 13; Mobile; rv:109.0) Gecko/119.0 Firefox/119.0

Browser: Firefox Mobile 119

Operating system: Android

Device Platform: Mobile

Date tested: one year ago

Test name	Executions per second
Object.entries	285697.5 Ops/sec
Object.keys	946000.6 Ops/sec

Script Preparation code:

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
Object.entries(window.parentObj).length;
Object.keys
Object.keys(window.parentObj).length;