Run results for: Iterate through a large object

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.69 Safari/537.36

Browser: Chrome 95

Operating system: Mac OS X 10.14.6

Device Platform: Desktop

Date tested: 2 years ago

Script Preparation code:

window.obj = {};
for (let i = 0; i < 10000; i++) {
  obj[`p${i}`] = Math.random();
}
delete obj.p0;

Tests:

for in
for (const key in obj) { window.result = obj[key]; }
keys
const keys = Object.keys(obj); for (let i = 0; i < keys.length; i++) { window.result = obj[keys[i]]; }
getOwnPropertyNames
const keys = Object.getOwnPropertyNames(obj); for (let i = 0; i < keys.length; i++) { window.result = obj[keys[i]]; }