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

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.69 Safari/537.36

Browser: Chrome 95

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
Object.entries + reduce	242808.6 Ops/sec
Object.keys + forEach	785360.8 Ops/sec

Script Preparation code:

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

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