Benchmark: Copy object using reduce Object.entries vs Object.keys + extra check for loop

HTML Preparation code:

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

Script Preparation code:

var params = {a: 1, b: 2, c: 3, d: 4};

Tests:

Reduce using Object.entries
const p = Object.entries(params).reduce((acc, [key, value]) => { acc[key] = value; return acc; }, {});
Reduce using Object.keys
const p = Object.keys(params).reduce((acc, key) => { acc[key] = params[key]; return acc; }, {});
Object.keys and for loop
const acc = {}; for (let i = 0, keys = Object.keys(params); i < keys.length; i++) { acc[keys[i]] = params[keys[i]]; }

Rendered benchmark preparation results:

Previous results

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.0.0 YaBrowser/24.10.0.0 Safari/537.36

Browser/OS: Yandex Browser 24 on Mac OS X 10.15.7

Object.keys and for loop

15.5M/s

Reduce using Object.keys

15.5M/s

Reduce using Object.entries

5.6M/s

View exact numbers

Copy object using reduce Object.entries vs Object.keys + extra check for loop (version: 2)