Run results for: Object.keys vs for ... in (bigger object)

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 18_7_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.7 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 18

Operating system: iOS 18.7.1

Device Platform: Mobile

Date tested: 9 months ago

window.objectKeys

368.7M/s

window.isEmpty

24.2M/s

View exact numbers

Test name	Executions per second
✓ window.objectKeys	368,655,488 Ops/sec
window.isEmpty	24,220,668 Ops/sec

Script Preparation code:

window.objectKeys = (value) => {
    return Object.keys(value).length > 0
}

window.isEmpty = (value) => {
    if (!value) {
        return true;
    }

    for (const key in value) {
        if (Object.hasOwn(value, key)) {
            return false;
        }
    }

    return true;
}

Tests:

window.objectKeys
const obj = { a: "a", b: "b", c: "c", d: "d", e: "e", f: "f", g: "g", h: "h", i: "i", j: "j", k: "k", l: "l", m: "m", } window.objectKeys(obj)
window.isEmpty
const obj = { a: "a", b: "b", c: "c", d: "d", e: "e", f: "f", g: "g", h: "h", i: "i", j: "j", k: "k", l: "l", m: "m", } window.isEmpty(obj)