Run results for: Compare Object.keys and Object.entries

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Safari/537.36

Browser: Chrome 135

Operating system: Linux

Device Platform: Desktop

Date tested: one year ago

Object.keys

207K/s

Object.entries

90K/s

View exact numbers

Test name	Executions per second
✓ Object.keys	207,496 Ops/sec
Object.entries	89,582 Ops/sec

HTML Preparation code:

<!--your preparation HTML code goes here-->

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.keys
const newObj = {}; const keys = Object.keys(window.parentObj); for (const k of keys) { newObj[k] = window.parentObj[k]; }
Object.entries
const newObj = {}; const entries = Object.entries(window.parentObj); for (const [k, v] of entries) { newObj[k] = v; }