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

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:144.0) Gecko/20100101 Firefox/144.0

Browser: Firefox 144

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: 9 months ago

window.isEmpty

15.7M/s

window.objectKeys

14.1M/s

View exact numbers

Test name	Executions per second
✓ window.isEmpty	15,657,520 Ops/sec
window.objectKeys	14,104,907 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)