Run results for: Object.keys vs for ... in

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:144.0) Gecko/20100101 Firefox/144.0

Browser: Firefox 144

Operating system: Linux

Device Platform: Desktop

Date tested: 9 months ago

window.objectKeys

3.6M/s

window.isEmpty

3.3M/s

View exact numbers

Test name	Executions per second
✓ window.objectKeys	3,552,904 Ops/sec
window.isEmpty	3,271,011 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 = { mr: 1, ml: 1, p: 1 } window.objectKeys(obj)
window.isEmpty
const obj = { mr: 1, ml: 1, p: 1 } window.isEmpty(obj)