Run results for: Object.entries VS Object.keys VS Object.keys with extra array VS Object.entries without array SG

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:108.0) Gecko/20100101 Firefox/108.0

Browser: Firefox 108

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
Object.entries	90294.4 Ops/sec
Object.keys	139391.3 Ops/sec
for in object.hasown	157912.2 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
const newObj = new Map(); const po = window.parentObj; let i = 0; for (const [k,v] of Object.entries(po)) { if (!(1 & i++)) newObj.set(k,v); }
Object.keys
const newObj = new Map(); const po = window.parentObj; let i = 0; for (const k of Object.keys(po)) { if (!(1 & i++)) newObj.set(k, po[k]); }
for in object.hasown
const newObj = new Map(); const po = window.parentObj; let i = 0; for (const k in po) { if (!(1 & i++) && Object.hasOwn(po, k)) newObj.set(k, po[k]); }

Run results for: Object.entries VS Object.keys VS Object.keys with extra array VS Object.entries without array SG

Object.entries

Object.keys

for in object.hasown