Run results for: Object.entries VS Object.keys VS Object.keys with extra array VS Object.entries without array 103

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:109.0) Gecko/20100101 Firefox/114.0

Browser: Firefox 114

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
Object.entries	129813.4 Ops/sec
Object.keys	213325.4 Ops/sec
Object.entries without array	143539.8 Ops/sec
For in	337743.5 Ops/sec
For of keys	202513.0 Ops/sec
For of entries	146220.8 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 = {}; const parentObj = window.parentObj; Object.entries(parentObj).forEach(([k, v], i) => { newObj[k] = v; });
Object.keys
const newObj = {}; const parentObj = window.parentObj; Object.keys(parentObj).forEach((k, i) => { newObj[k] = parentObj[k]; });
Object.entries without array
const newObj = {}; Object.entries(window.parentObj).forEach((keyAndVal, i) => { newObj[keyAndVal[0]] = keyAndVal[1]; });
For in
const newObj = {}; const parentObj = window.parentObj; for (let key in parentObj) { newObj[key] = parentObj[key]; }
For of keys
const newObj = {}; const parentObj = window.parentObj; for (let key of Object.keys(parentObj)) { newObj[key] = parentObj[key]; }
For of entries
const newObj = {}; const parentObj = window.parentObj; for (let kv of Object.entries(parentObj)) { newObj[kv[0]] = kv[1]; }

Run results for: Object.entries VS Object.keys VS Object.keys with extra array VS Object.entries without array 103

Object.entries

Object.keys

Object.entries without array

For in

For of keys

For of entries