Run results for: Object.entries + reduce VS Object.keys + forEach

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.0.0 Whale/3.28.266.14 Safari/537.36

Browser: Chrome 128

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Object.keys + forEach

1.0M/s

Object.entries + reduce

372K/s

View exact numbers

Test name	Executions per second
✓ Object.keys + forEach	1,047,700 Ops/sec
Object.entries + reduce	372,051 Ops/sec

Script Preparation code:

window.obj = {
    a: 1,
    b: 2,
    c: 3,
    d: 4,
    e: 5,
}

Tests:

Object.entries + reduce
Object.entries(obj).reduce((acc, [k, v]) => acc[k] = v, {});
Object.keys + forEach
const newObj = {}; Object.keys(obj).forEach((k) => newObj[k] = obj[k]);