Run results for: My: Object.entries vs For In (size: 100000) B

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36

Browser: Chrome 126

Operating system: Linux

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
Object.entries	13.0 Ops/sec
For In	20.0 Ops/sec
For Of Object.entries	15.1 Ops/sec
For Of Object.keys	19.5 Ops/sec

Script Preparation code:

var ns = [100000];
var results = Array(ns.length); // 1.000 -> 10.000 -> 100.000 -> 1.000.000 -> 10.000.000
ns.forEach((n, i) => {
    results[i] = [...Array(n).keys()].reduce((acc, c) => {
        acc['k_' + String(c).padStart(10, '0')] = Math.random();
        return acc;
    }, {});
});
let sum = 0;

Tests:

Object.entries
sum = 0; Object.entries(results[0]).forEach(([k, v]) => sum += results[0][k]);
For In
sum = 0; for (const k in results[0]) { sum += results[0][k] }
For Of Object.entries
sum = 0; for (const [k, v] of Object.entries(results[0])) { sum += v }
For Of Object.keys
sum = 0; for (const k of Object.keys(results[0])) { sum += results[0][k] }

Run results for: My: Object.entries vs For In (size: 100000) B

Object.entries

For In

For Of Object.entries

For Of Object.keys